diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0f4b8b..97e8462 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@ All notable changes to this project will be documented in this file.
     ListenerClass for the discovery service.
   - Configuration parameter `spec.nodes.roleGroups.<role-group-name>.config.discoveryServiceExposed`
     added to expose a role-group via the discovery service.
+- Add support for OpenSearch 3.4.0 ([#108]).
 
 ### Changed
 
@@ -43,6 +44,7 @@ All notable changes to this project will be documented in this file.
 [#97]: https://github.com/stackabletech/opensearch-operator/pull/97
 [#100]: https://github.com/stackabletech/opensearch-operator/pull/100
 [#107]: https://github.com/stackabletech/opensearch-operator/pull/107
+[#108]: https://github.com/stackabletech/opensearch-operator/pull/108
 
 ## [25.11.0] - 2025-11-07
 
diff --git a/docs/modules/opensearch/examples/getting_started/getting_started.sh b/docs/modules/opensearch/examples/getting_started/getting_started.sh
index ae98ed8..de50009 100755
--- a/docs/modules/opensearch/examples/getting_started/getting_started.sh
+++ b/docs/modules/opensearch/examples/getting_started/getting_started.sh
@@ -112,7 +112,7 @@ kubectl create secret generic opensearch-credentials \
 
 helm install opensearch-dashboards opensearch-dashboards \
     --repo https://opensearch-project.github.io/helm-charts \
-    --version 3.1.0 \
+    --version 3.4.0 \
     --values opensearch-dashboards-values.yaml \
     --wait
 # end::opensearch-dashboards[]
diff --git a/docs/modules/opensearch/examples/getting_started/getting_started.sh.j2 b/docs/modules/opensearch/examples/getting_started/getting_started.sh.j2
index 0705511..51246e8 100755
--- a/docs/modules/opensearch/examples/getting_started/getting_started.sh.j2
+++ b/docs/modules/opensearch/examples/getting_started/getting_started.sh.j2
@@ -112,7 +112,7 @@ kubectl create secret generic opensearch-credentials \
 
 helm install opensearch-dashboards opensearch-dashboards \
     --repo https://opensearch-project.github.io/helm-charts \
-    --version 3.1.0 \
+    --version 3.4.0 \
     --values opensearch-dashboards-values.yaml \
     --wait
 # end::opensearch-dashboards[]
diff --git a/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml b/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml
index c311e76..1073c1a 100644
--- a/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml
+++ b/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml
@@ -1,7 +1,7 @@
 ---
 image:
   repository: oci.stackable.tech/sdp/opensearch-dashboards
-  tag: 3.1.0-stackable0.0.0-dev
+  tag: 3.4.0-stackable0.0.0-dev
 serviceAccount:
   create: false
   name: simple-opensearch-serviceaccount
diff --git a/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml.j2 b/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml.j2
index aa62bb8..0b3977f 100644
--- a/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml.j2
+++ b/docs/modules/opensearch/examples/getting_started/opensearch-dashboards-values.yaml.j2
@@ -1,7 +1,7 @@
 ---
 image:
   repository: oci.stackable.tech/sdp/opensearch-dashboards
-  tag: 3.1.0-stackable{{ versions.opensearch }}
+  tag: 3.4.0-stackable{{ versions.opensearch }}
 serviceAccount:
   create: false
   name: simple-opensearch-serviceaccount
diff --git a/docs/modules/opensearch/examples/getting_started/opensearch.yaml b/docs/modules/opensearch/examples/getting_started/opensearch.yaml
index d5c0d84..4790255 100644
--- a/docs/modules/opensearch/examples/getting_started/opensearch.yaml
+++ b/docs/modules/opensearch/examples/getting_started/opensearch.yaml
@@ -5,7 +5,7 @@ metadata:
   name: simple-opensearch
 spec:
   image:
-    productVersion: 3.1.0
+    productVersion: 3.4.0
   nodes:
     roleConfig:
       discoveryServiceListenerClass: external-stable
diff --git a/docs/modules/opensearch/pages/usage-guide/configuration-environment-overrides.adoc b/docs/modules/opensearch/pages/usage-guide/configuration-environment-overrides.adoc
index ad8a3c3..38a31af 100644
--- a/docs/modules/opensearch/pages/usage-guide/configuration-environment-overrides.adoc
+++ b/docs/modules/opensearch/pages/usage-guide/configuration-environment-overrides.adoc
@@ -91,7 +91,7 @@ plugins:
 <1> Commas in list entries cannot be escaped.
 <2> The brackets must be escaped in `configOverrides` as follows: `"[\"role1\", \"role2\", \"role3\"]"`
 <3> Indexed flat lists are considered "legacy" in the OpenSearch code.
-// see https://github.com/opensearch-project/OpenSearch/blob/3.1.0/server/src/main/java/org/opensearch/common/settings/Settings.java#L1049
+// see https://github.com/opensearch-project/OpenSearch/blob/3.4.0/server/src/main/java/org/opensearch/common/settings/Settings.java#L1049
 
 Other types can be set as strings in `configOverrides` because OpenSearch parses them:
 
diff --git a/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc b/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc
index 784502f..080405b 100644
--- a/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc
+++ b/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc
@@ -13,7 +13,7 @@ A basic `values.yaml` file to deploy OpenSearch Dashboards with this chart might
 opensearchHosts: null # <1>
 image: # <2>
   repository: oci.stackable.tech/sdp/opensearch-dashboards
-  tag: 3.1.0-stackable0.0.0-dev
+  tag: 3.4.0-stackable0.0.0-dev
 serviceAccount:
   create: false
   name: opensearch-serviceaccount # <3>
@@ -92,7 +92,7 @@ After the values are adjusted according to your deployment, especially `opensear
 ----
 helm install opensearch-dashboards opensearch-dashboards \
     --repo https://opensearch-project.github.io/helm-charts \
-    --version 3.1.0 \
+    --version 3.4.0 \
     --values opensearch-dashboards-values.yaml \
     --wait
 ----
diff --git a/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc.j2 b/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc.j2
index b5d25bd..da964d3 100644
--- a/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc.j2
+++ b/docs/modules/opensearch/pages/usage-guide/opensearch-dashboards.adoc.j2
@@ -13,7 +13,7 @@ A basic `values.yaml` file to deploy OpenSearch Dashboards with this chart might
 opensearchHosts: null # <1>
 image: # <2>
   repository: oci.stackable.tech/sdp/opensearch-dashboards
-  tag: 3.1.0-stackable{{ versions.opensearch }}
+  tag: 3.4.0-stackable{{ versions.opensearch }}
 serviceAccount:
   create: false
   name: opensearch-serviceaccount # <3>
@@ -92,7 +92,7 @@ After the values are adjusted according to your deployment, especially `opensear
 ----
 helm install opensearch-dashboards opensearch-dashboards \
     --repo https://opensearch-project.github.io/helm-charts \
-    --version 3.1.0 \
+    --version 3.4.0 \
     --values opensearch-dashboards-values.yaml \
     --wait
 ----
diff --git a/docs/modules/opensearch/pages/usage-guide/security.adoc b/docs/modules/opensearch/pages/usage-guide/security.adoc
index 88b6db8..d928d13 100644
--- a/docs/modules/opensearch/pages/usage-guide/security.adoc
+++ b/docs/modules/opensearch/pages/usage-guide/security.adoc
@@ -17,7 +17,7 @@ metadata:
   name: opensearch
 spec:
   image:
-    productVersion: 3.1.0
+    productVersion: 3.4.0
   clusterConfig:
     tls:
       serverSecretClass: tls # <1>
diff --git a/docs/modules/opensearch/partials/supported-versions.adoc b/docs/modules/opensearch/partials/supported-versions.adoc
index 4286ea8..9912bbc 100644
--- a/docs/modules/opensearch/partials/supported-versions.adoc
+++ b/docs/modules/opensearch/partials/supported-versions.adoc
@@ -3,3 +3,4 @@
 // Stackable Platform documentation.
 
 - 3.1.0 (LTS)
+- 3.4.0
diff --git a/rust/operator-binary/src/controller.rs b/rust/operator-binary/src/controller.rs
index cb3b938..133755b 100644
--- a/rust/operator-binary/src/controller.rs
+++ b/rust/operator-binary/src/controller.rs
@@ -506,14 +506,14 @@ mod tests {
     fn validated_cluster() -> ValidatedCluster {
         ValidatedCluster::new(
             ResolvedProductImage {
-                product_version: "3.1.0".to_owned(),
-                app_version_label_value: LabelValue::from_str("3.1.0-stackable0.0.0-dev")
+                product_version: "3.4.0".to_owned(),
+                app_version_label_value: LabelValue::from_str("3.4.0-stackable0.0.0-dev")
                     .expect("should be a valid label value"),
-                image: "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev".to_string(),
+                image: "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev".to_string(),
                 image_pull_policy: "Always".to_owned(),
                 pull_secrets: None,
             },
-            ProductVersion::from_str_unsafe("3.1.0"),
+            ProductVersion::from_str_unsafe("3.4.0"),
             ClusterName::from_str_unsafe("my-opensearch"),
             NamespaceName::from_str_unsafe("default"),
             uuid!("e6ac237d-a6d4-43a1-8135-f36506110912"),
diff --git a/rust/operator-binary/src/controller/build.rs b/rust/operator-binary/src/controller/build.rs
index 841eabd..9055050 100644
--- a/rust/operator-binary/src/controller/build.rs
+++ b/rust/operator-binary/src/controller/build.rs
@@ -175,14 +175,14 @@ mod tests {
     fn validated_cluster() -> ValidatedCluster {
         ValidatedCluster::new(
             ResolvedProductImage {
-                product_version: "3.1.0".to_owned(),
-                app_version_label_value: LabelValue::from_str("3.1.0-stackable0.0.0-dev")
+                product_version: "3.4.0".to_owned(),
+                app_version_label_value: LabelValue::from_str("3.4.0-stackable0.0.0-dev")
                     .expect("should be a valid label value"),
-                image: "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev".to_string(),
+                image: "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev".to_string(),
                 image_pull_policy: "Always".to_owned(),
                 pull_secrets: None,
             },
-            ProductVersion::from_str_unsafe("3.1.0"),
+            ProductVersion::from_str_unsafe("3.4.0"),
             ClusterName::from_str_unsafe("my-opensearch"),
             NamespaceName::from_str_unsafe("default"),
             uuid!("e6ac237d-a6d4-43a1-8135-f36506110912"),
diff --git a/rust/operator-binary/src/controller/build/node_config.rs b/rust/operator-binary/src/controller/build/node_config.rs
index ed4674a..de266ce 100644
--- a/rust/operator-binary/src/controller/build/node_config.rs
+++ b/rust/operator-binary/src/controller/build/node_config.rs
@@ -282,7 +282,7 @@ impl NodeConfig {
     pub fn value_as_bool(value: &Value) -> Option<bool> {
         value.as_bool().or(
             // OpenSearch parses the strings "true" and "false" as boolean, see
-            // https://github.com/opensearch-project/OpenSearch/blob/3.1.0/libs/common/src/main/java/org/opensearch/common/Booleans.java#L45-L84
+            // https://github.com/opensearch-project/OpenSearch/blob/3.4.0/libs/common/src/main/java/org/opensearch/common/Booleans.java#L45-L84
             value
                 .as_str()
                 .and_then(|value| FromStr::from_str(value).ok()),
@@ -386,7 +386,7 @@ impl NodeConfig {
     /// Please read the following sections for an explanation of these restrictions.
     ///
     /// This configuration setting replaces the setting `cluster.initial_master_nodes`, see
-    /// <https://github.com/opensearch-project/OpenSearch/blob/3.1.0/server/src/main/java/org/opensearch/cluster/coordination/ClusterBootstrapService.java#L79-L93>.
+    /// <https://github.com/opensearch-project/OpenSearch/blob/3.4.0/server/src/main/java/org/opensearch/cluster/coordination/ClusterBootstrapService.java#L79-L93>.
     ///
     /// This setting is required on nodes with the cluster-manager node role on a multi-node
     /// cluster. Otherwise the bootstrapping of the cluster fails and all pods report:
@@ -396,7 +396,7 @@ impl NodeConfig {
     /// error is thrown:
     ///  > setting [cluster.initial_cluster_manager_nodes] is not allowed when [discovery.type] is set to [single-node]
     ///
-    /// see <https://github.com/opensearch-project/OpenSearch/blob/3.1.0/server/src/main/java/org/opensearch/cluster/coordination/ClusterBootstrapService.java#L126-L136>
+    /// see <https://github.com/opensearch-project/OpenSearch/blob/3.4.0/server/src/main/java/org/opensearch/cluster/coordination/ClusterBootstrapService.java#L126-L136>
     ///
     /// This setting does not seem to have an effect on nodes without the cluster-manager node
     /// role. However, as it is recommended (see the Elasticsearch documentation below) to not set
@@ -534,7 +534,7 @@ mod tests {
     }
 
     fn node_config(test_config: TestConfig) -> NodeConfig {
-        let image: ProductImage = serde_json::from_str(r#"{"productVersion": "3.1.0"}"#)
+        let image: ProductImage = serde_json::from_str(r#"{"productVersion": "3.4.0"}"#)
             .expect("should be a valid ProductImage");
 
         let role_group_name = RoleGroupName::from_str_unsafe("data");
@@ -584,10 +584,10 @@ mod tests {
 
         let cluster = ValidatedCluster::new(
             ResolvedProductImage {
-                product_version: "3.1.0".to_owned(),
-                app_version_label_value: LabelValue::from_str("3.1.0-stackable0.0.0-dev")
+                product_version: "3.4.0".to_owned(),
+                app_version_label_value: LabelValue::from_str("3.4.0-stackable0.0.0-dev")
                     .expect("should be a valid label value"),
-                image: "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev".to_string(),
+                image: "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev".to_string(),
                 image_pull_policy: "Always".to_owned(),
                 pull_secrets: None,
             },
diff --git a/rust/operator-binary/src/controller/build/product_logging/config.rs b/rust/operator-binary/src/controller/build/product_logging/config.rs
index c70694c..edc3e96 100644
--- a/rust/operator-binary/src/controller/build/product_logging/config.rs
+++ b/rust/operator-binary/src/controller/build/product_logging/config.rs
@@ -91,7 +91,7 @@ fn log4j2_console_appender_config(
             "PatternLayout".to_owned(),
         ),
         // Same as the default layout pattern of the console appender
-        // see https://github.com/opensearch-project/OpenSearch/blob/3.1.0/distribution/src/config/log4j2.properties#L17
+        // see https://github.com/opensearch-project/OpenSearch/blob/3.4.0/distribution/src/config/log4j2.properties#L17
         (
             "appender.CONSOLE.layout.pattern".to_owned(),
             "[%d{ISO8601}][%-5p][%-25c{1.}] [%node_name]%marker %m%n".to_owned(),
diff --git a/rust/operator-binary/src/controller/build/product_logging/vector-test.yaml b/rust/operator-binary/src/controller/build/product_logging/vector-test.yaml
index 7ffa2cd..0468f60 100644
--- a/rust/operator-binary/src/controller/build/product_logging/vector-test.yaml
+++ b/rust/operator-binary/src/controller/build/product_logging/vector-test.yaml
@@ -45,14 +45,14 @@ tests:
             {"type": "server", "timestamp": "2025-10-01T12:47:28,363Z", "level": "INFO", "component": "o.o.c.c.JoinHelper", "cluster.name": "opensearch", "node.name": "opensearch-nodes-cluster-manager-0", "message": "failed to join {opensearch-nodes-cluster-manager-0}{sk-r0P_TTYuPqaamTFbjKg}{fIRSMbQYSe2nKQZ_sPn4kg}{10.244.0.20}{10.244.0.20:9300}{m}{shard_indexing_pressure_enabled=true} with JoinRequest{sourceNode={opensearch-nodes-cluster-manager-0}{sk-r0P_TTYuPqaamTFbjKg}{fIRSMbQYSe2nKQZ_sPn4kg}{10.244.0.20}{10.244.0.20:9300}{m}{shard_indexing_pressure_enabled=true}, minimumTerm=0, optionalJoin=Optional[Join{term=1, lastAcceptedTerm=0, lastAcceptedVersion=0, sourceNode={opensearch-nodes-cluster-manager-0}{sk-r0P_TTYuPqaamTFbjKg}{fIRSMbQYSe2nKQZ_sPn4kg}{10.244.0.20}{10.244.0.20:9300}{m}{shard_indexing_pressure_enabled=true}, targetNode={opensearch-nodes-cluster-manager-0}{sk-r0P_TTYuPqaamTFbjKg}{fIRSMbQYSe2nKQZ_sPn4kg}{10.244.0.20}{10.244.0.20:9300}{m}{shard_indexing_pressure_enabled=true}}]}",
             "stacktrace": ["org.opensearch.transport.RemoteTransportException: [opensearch-nodes-cluster-manager-0][10.244.0.20:9300][internal:cluster/coordination/join]",
             "Caused by: org.opensearch.cluster.coordination.CoordinationStateRejectedException: became follower",
-            "at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.lambda$$close$$3(JoinHelper.java:648) ~[opensearch-3.1.0.jar:3.1.0]",
+            "at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.lambda$$close$$3(JoinHelper.java:648) ~[opensearch-3.4.0.jar:3.4.0]",
             "at java.base/java.util.HashMap$$Values.forEach(HashMap.java:1073) ~[?:?]",
-            "at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.close(JoinHelper.java:648) ~[opensearch-3.1.0.jar:3.1.0]",
-            "at org.opensearch.cluster.coordination.Coordinator.becomeFollower(Coordinator.java:829) ~[opensearch-3.1.0.jar:3.1.0]",
-            "at org.opensearch.cluster.coordination.Coordinator.onFollowerCheckRequest(Coordinator.java:405) ~[opensearch-3.1.0.jar:3.1.0]",
-            "at org.opensearch.cluster.coordination.FollowersChecker$$2.doRun(FollowersChecker.java:250) ~[opensearch-3.1.0.jar:3.1.0]",
-            "at org.opensearch.common.util.concurrent.ThreadContext$$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:975) ~[opensearch-3.1.0.jar:3.1.0]",
-            "at org.opensearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:52) ~[opensearch-3.1.0.jar:3.1.0]",
+            "at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.close(JoinHelper.java:648) ~[opensearch-3.4.0.jar:3.4.0]",
+            "at org.opensearch.cluster.coordination.Coordinator.becomeFollower(Coordinator.java:829) ~[opensearch-3.4.0.jar:3.4.0]",
+            "at org.opensearch.cluster.coordination.Coordinator.onFollowerCheckRequest(Coordinator.java:405) ~[opensearch-3.4.0.jar:3.4.0]",
+            "at org.opensearch.cluster.coordination.FollowersChecker$$2.doRun(FollowersChecker.java:250) ~[opensearch-3.4.0.jar:3.4.0]",
+            "at org.opensearch.common.util.concurrent.ThreadContext$$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:975) ~[opensearch-3.4.0.jar:3.4.0]",
+            "at org.opensearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:52) ~[opensearch-3.4.0.jar:3.4.0]",
             "at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?]",
             "at java.base/java.util.concurrent.ThreadPoolExecutor$$Worker.run(ThreadPoolExecutor.java:642) ~[?:?]",
             "at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]"] }
@@ -75,14 +75,14 @@ tests:
                   \n\
                   org.opensearch.transport.RemoteTransportException: [opensearch-nodes-cluster-manager-0][10.244.0.20:9300][internal:cluster/coordination/join]\n\
                   Caused by: org.opensearch.cluster.coordination.CoordinationStateRejectedException: became follower\n\
-                  at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.lambda$$close$$3(JoinHelper.java:648) ~[opensearch-3.1.0.jar:3.1.0]\n\
+                  at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.lambda$$close$$3(JoinHelper.java:648) ~[opensearch-3.4.0.jar:3.4.0]\n\
                   at java.base/java.util.HashMap$$Values.forEach(HashMap.java:1073) ~[?:?]\n\
-                  at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.close(JoinHelper.java:648) ~[opensearch-3.1.0.jar:3.1.0]\n\
-                  at org.opensearch.cluster.coordination.Coordinator.becomeFollower(Coordinator.java:829) ~[opensearch-3.1.0.jar:3.1.0]\n\
-                  at org.opensearch.cluster.coordination.Coordinator.onFollowerCheckRequest(Coordinator.java:405) ~[opensearch-3.1.0.jar:3.1.0]\n\
-                  at org.opensearch.cluster.coordination.FollowersChecker$$2.doRun(FollowersChecker.java:250) ~[opensearch-3.1.0.jar:3.1.0]\n\
-                  at org.opensearch.common.util.concurrent.ThreadContext$$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:975) ~[opensearch-3.1.0.jar:3.1.0]\n\
-                  at org.opensearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:52) ~[opensearch-3.1.0.jar:3.1.0]\n\
+                  at org.opensearch.cluster.coordination.JoinHelper$$CandidateJoinAccumulator.close(JoinHelper.java:648) ~[opensearch-3.4.0.jar:3.4.0]\n\
+                  at org.opensearch.cluster.coordination.Coordinator.becomeFollower(Coordinator.java:829) ~[opensearch-3.4.0.jar:3.4.0]\n\
+                  at org.opensearch.cluster.coordination.Coordinator.onFollowerCheckRequest(Coordinator.java:405) ~[opensearch-3.4.0.jar:3.4.0]\n\
+                  at org.opensearch.cluster.coordination.FollowersChecker$$2.doRun(FollowersChecker.java:250) ~[opensearch-3.4.0.jar:3.4.0]\n\
+                  at org.opensearch.common.util.concurrent.ThreadContext$$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:975) ~[opensearch-3.4.0.jar:3.4.0]\n\
+                  at org.opensearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:52) ~[opensearch-3.4.0.jar:3.4.0]\n\
                   at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?]\n\
                   at java.base/java.util.concurrent.ThreadPoolExecutor$$Worker.run(ThreadPoolExecutor.java:642) ~[?:?]\n\
                   at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]",
diff --git a/rust/operator-binary/src/controller/build/role_builder.rs b/rust/operator-binary/src/controller/build/role_builder.rs
index f7332e5..2a174e8 100644
--- a/rust/operator-binary/src/controller/build/role_builder.rs
+++ b/rust/operator-binary/src/controller/build/role_builder.rs
@@ -370,7 +370,7 @@ mod tests {
     }
 
     fn role_builder<'a>(context_names: &'a ContextNames) -> RoleBuilder<'a> {
-        let image: ProductImage = serde_json::from_str(r#"{"productVersion": "3.1.0"}"#)
+        let image: ProductImage = serde_json::from_str(r#"{"productVersion": "3.4.0"}"#)
             .expect("should be a valid ProductImage");
 
         let role_group_config = OpenSearchRoleGroupConfig {
@@ -405,10 +405,10 @@ mod tests {
 
         let cluster = ValidatedCluster::new(
             ResolvedProductImage {
-                product_version: "3.1.0".to_owned(),
-                app_version_label_value: LabelValue::from_str("3.1.0-stackable0.0.0-dev")
+                product_version: "3.4.0".to_owned(),
+                app_version_label_value: LabelValue::from_str("3.4.0-stackable0.0.0-dev")
                     .expect("should be a valid label value"),
-                image: "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev".to_string(),
+                image: "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev".to_string(),
                 image_pull_policy: "Always".to_owned(),
                 pull_secrets: None,
             },
@@ -456,7 +456,7 @@ mod tests {
                         "app.kubernetes.io/instance": "my-opensearch-cluster",
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable"
                     },
                     "name": "my-opensearch-cluster-serviceaccount",
@@ -494,7 +494,7 @@ mod tests {
                         "app.kubernetes.io/instance": "my-opensearch-cluster",
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable"
                     },
                     "name": "my-opensearch-cluster-rolebinding",
@@ -545,7 +545,7 @@ mod tests {
                         "app.kubernetes.io/instance": "my-opensearch-cluster",
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable"
                     },
                     "name": "my-opensearch-cluster-seed-nodes",
@@ -601,7 +601,7 @@ mod tests {
                         "app.kubernetes.io/instance": "my-opensearch-cluster",
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable",
                     },
                     "name": "my-opensearch-cluster",
@@ -652,7 +652,7 @@ mod tests {
                         "app.kubernetes.io/instance": "my-opensearch-cluster",
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable",
                     },
                     "name": "my-opensearch-cluster",
diff --git a/rust/operator-binary/src/controller/build/role_group_builder.rs b/rust/operator-binary/src/controller/build/role_group_builder.rs
index c964ac8..0a1c1bf 100644
--- a/rust/operator-binary/src/controller/build/role_group_builder.rs
+++ b/rust/operator-binary/src/controller/build/role_group_builder.rs
@@ -921,10 +921,10 @@ mod tests {
 
     fn validated_cluster() -> ValidatedCluster {
         let image = ResolvedProductImage {
-            product_version: "3.1.0".to_owned(),
-            app_version_label_value: LabelValue::from_str("3.1.0-stackable0.0.0-dev")
+            product_version: "3.4.0".to_owned(),
+            app_version_label_value: LabelValue::from_str("3.4.0-stackable0.0.0-dev")
                 .expect("should be a valid label value"),
-            image: "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev".to_string(),
+            image: "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev".to_string(),
             image_pull_policy: "Always".to_owned(),
             pull_secrets: None,
         };
@@ -1040,7 +1040,7 @@ mod tests {
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
                         "app.kubernetes.io/role-group": "default",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable"
                     },
                     "name": "my-opensearch-cluster-nodes-default",
@@ -1084,7 +1084,7 @@ mod tests {
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
                         "app.kubernetes.io/role-group": "default",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable",
                         "restarter.stackable.tech/enabled": "true"
                     },
@@ -1123,7 +1123,7 @@ mod tests {
                                 "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                                 "app.kubernetes.io/name": "opensearch",
                                 "app.kubernetes.io/role-group": "default",
-                                "app.kubernetes.io/version": "3.1.0",
+                                "app.kubernetes.io/version": "3.4.0",
                                 "stackable.tech/opensearch-role.cluster_manager": "true",
                                 "stackable.tech/opensearch-role.data": "true",
                                 "stackable.tech/opensearch-role.ingest": "true",
@@ -1224,7 +1224,7 @@ mod tests {
                                             "value": "$(_POD_NAME).my-opensearch-cluster-nodes-default-headless.default.svc.cluster.local"
                                         },
                                     ],
-                                    "image": "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev",
+                                    "image": "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev",
                                     "imagePullPolicy": "Always",
                                     "name": "opensearch",
                                     "ports": [
@@ -1371,7 +1371,7 @@ mod tests {
                                             "value": "info",
                                         },
                                     ],
-                                    "image": "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev",
+                                    "image": "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev",
                                     "imagePullPolicy": "Always",
                                     "name": "vector",
                                     "resources": {
@@ -1417,7 +1417,7 @@ mod tests {
                                         "pipefail",
                                         "-c"
                                     ],
-                                    "image": "oci.stackable.tech/sdp/opensearch:3.1.0-stackable0.0.0-dev",
+                                    "image": "oci.stackable.tech/sdp/opensearch:3.4.0-stackable0.0.0-dev",
                                     "imagePullPolicy": "Always",
                                     "name": "init-keystore",
                                     "resources": {},
@@ -1564,7 +1564,7 @@ mod tests {
                                     "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                                     "app.kubernetes.io/name": "opensearch",
                                     "app.kubernetes.io/role-group": "default",
-                                    "app.kubernetes.io/version": "3.1.0",
+                                    "app.kubernetes.io/version": "3.4.0",
                                     "stackable.tech/vendor": "Stackable"
                                 },
                                 "name": "listener"
@@ -1594,7 +1594,7 @@ mod tests {
                                     "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                                     "app.kubernetes.io/name": "opensearch",
                                     "app.kubernetes.io/role-group": "default",
-                                    "app.kubernetes.io/version": "3.1.0",
+                                    "app.kubernetes.io/version": "3.4.0",
                                     "stackable.tech/vendor": "Stackable",
                                 },
                                 "name": "discovery-service-listener",
@@ -1662,7 +1662,7 @@ mod tests {
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
                         "app.kubernetes.io/role-group": "default",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "prometheus.io/scrape": "true",
                         "stackable.tech/vendor": "Stackable"
                     },
@@ -1723,7 +1723,7 @@ mod tests {
                         "app.kubernetes.io/managed-by": "opensearch.stackable.tech_opensearchcluster",
                         "app.kubernetes.io/name": "opensearch",
                         "app.kubernetes.io/role-group": "default",
-                        "app.kubernetes.io/version": "3.1.0",
+                        "app.kubernetes.io/version": "3.4.0",
                         "stackable.tech/vendor": "Stackable"
                     },
                     "name": "my-opensearch-cluster-nodes-default",
diff --git a/rust/operator-binary/src/controller/validate.rs b/rust/operator-binary/src/controller/validate.rs
index bacae8b..d161bfb 100644
--- a/rust/operator-binary/src/controller/validate.rs
+++ b/rust/operator-binary/src/controller/validate.rs
@@ -396,20 +396,20 @@ mod tests {
         assert_eq!(
             Some(ValidatedCluster::new(
                 ResolvedProductImage {
-                    product_version: "3.1.0".to_owned(),
+                    product_version: "3.4.0".to_owned(),
                     app_version_label_value: LabelValue::from_str(&format!(
-                        "3.1.0-stackable{pkg_version}",
+                        "3.4.0-stackable{pkg_version}",
                         pkg_version = built_info::PKG_VERSION
                     ))
                     .expect("should be a valid label value"),
                     image: format!(
-                        "oci.stackable.tech/sdp/opensearch:3.1.0-stackable{pkg_version}",
+                        "oci.stackable.tech/sdp/opensearch:3.4.0-stackable{pkg_version}",
                         pkg_version = built_info::PKG_VERSION
                     ),
                     image_pull_policy: "Always".to_owned(),
                     pull_secrets: None,
                 },
-                ProductVersion::from_str_unsafe("3.1.0"),
+                ProductVersion::from_str_unsafe("3.4.0"),
                 ClusterName::from_str_unsafe("my-opensearch"),
                 NamespaceName::from_str_unsafe("default"),
                 uuid!("e6ac237d-a6d4-43a1-8135-f36506110912"),
@@ -832,7 +832,7 @@ mod tests {
                 ..ObjectMeta::default()
             },
             spec: v1alpha1::OpenSearchClusterSpec {
-                image: serde_json::from_str(r#"{"productVersion": "3.1.0"}"#)
+                image: serde_json::from_str(r#"{"productVersion": "3.4.0"}"#)
                     .expect("should be a valid ProductImage structure"),
                 cluster_config: v1alpha1::OpenSearchClusterConfig {
                     tls: v1alpha1::OpenSearchTls::default(),
diff --git a/rust/operator-binary/src/framework/types/operator.rs b/rust/operator-binary/src/framework/types/operator.rs
index d2020ab..8ebb09f 100644
--- a/rust/operator-binary/src/framework/types/operator.rs
+++ b/rust/operator-binary/src/framework/types/operator.rs
@@ -18,7 +18,7 @@ attributed_string_type! {
 attributed_string_type! {
     ProductVersion,
     "The version of a product",
-    "3.1.0",
+    "3.4.0",
     is_valid_label_value
 }
 
diff --git a/tests/test-definition.yaml b/tests/test-definition.yaml
index 108cdf6..649b799 100644
--- a/tests/test-definition.yaml
+++ b/tests/test-definition.yaml
@@ -3,9 +3,10 @@ dimensions:
   - name: opensearch
     values:
       - 3.1.0
+      - 3.4.0
       # To use a custom image, add a comma and the full name after the product version, e.g.:
-      # - 3.1.0,oci.stackable.tech/sandbox/opensearch:3.1.0-stackable0.0.0-dev
-      # - 3.1.0,localhost:5000/sdp/opensearch:3.1.0-stackable0.0.0-dev
+      # - 3.4.0,oci.stackable.tech/sandbox/opensearch:3.4.0-stackable0.0.0-dev
+      # - 3.4.0,localhost:5000/sdp/opensearch:3.4.0-stackable0.0.0-dev
   - name: opensearch_home
     values:
       - /stackable/opensearch
@@ -83,6 +84,6 @@ suites:
     patch:
       - dimensions:
           - name: opensearch
-            expr: 3.1.0,opensearchproject/opensearch:3.1.0
+            expr: 3.4.0,opensearchproject/opensearch:3.4.0
           - name: opensearch_home
             expr: /usr/share/opensearch