diff --git a/openapi/openapiv2.json b/openapi/openapiv2.json
index ddbc48c61..5b5719cc7 100644
--- a/openapi/openapiv2.json
+++ b/openapi/openapiv2.json
@@ -10397,6 +10397,10 @@
         "searchAttributes": {
           "$ref": "#/definitions/v1SearchAttributes",
           "description": "Schedule search attributes to be updated.\nDo not set this field if you do not want to update the search attributes.\nA non-null empty object will set the search attributes to an empty map.\nNote: you cannot only update the search attributes with `UpdateScheduleRequest`,\nyou must also set the `schedule` field; otherwise, it will unset the schedule."
+        },
+        "memo": {
+          "$ref": "#/definitions/v1Memo",
+          "description": "Schedule memo to replace. If set, replaces the entire memo.\nDo not set this field if you do not want to update the memo.\nA non-null empty object will clear the memo."
         }
       }
     },
diff --git a/openapi/openapiv3.yaml b/openapi/openapiv3.yaml
index cd503dccd..c2dbbc15d 100644
--- a/openapi/openapiv3.yaml
+++ b/openapi/openapiv3.yaml
@@ -14797,6 +14797,13 @@ components:
              A non-null empty object will set the search attributes to an empty map.
              Note: you cannot only update the search attributes with `UpdateScheduleRequest`,
              you must also set the `schedule` field; otherwise, it will unset the schedule.
+        memo:
+          allOf:
+            - $ref: '#/components/schemas/Memo'
+          description: |-
+            Schedule memo to replace. If set, replaces the entire memo.
+             Do not set this field if you do not want to update the memo.
+             A non-null empty object will clear the memo.
     UpdateScheduleResponse:
       type: object
       properties: {}
diff --git a/temporal/api/workflowservice/v1/request_response.proto b/temporal/api/workflowservice/v1/request_response.proto
index 2d9dd7b83..7bfcf236e 100644
--- a/temporal/api/workflowservice/v1/request_response.proto
+++ b/temporal/api/workflowservice/v1/request_response.proto
@@ -1355,6 +1355,10 @@ message UpdateScheduleRequest {
     // Note: you cannot only update the search attributes with `UpdateScheduleRequest`,
     // you must also set the `schedule` field; otherwise, it will unset the schedule.
     temporal.api.common.v1.SearchAttributes search_attributes = 7;
+    // Schedule memo to replace. If set, replaces the entire memo.
+    // Do not set this field if you do not want to update the memo.
+    // A non-null empty object will clear the memo.
+    temporal.api.common.v1.Memo memo = 8;
 }
 
 message UpdateScheduleResponse {