diff --git a/src/AcceptanceTests/NServiceBus.Encryption.MessageProperty.AcceptanceTests.csproj b/src/AcceptanceTests/NServiceBus.Encryption.MessageProperty.AcceptanceTests.csproj
index d1d3745..6e26612 100644
--- a/src/AcceptanceTests/NServiceBus.Encryption.MessageProperty.AcceptanceTests.csproj
+++ b/src/AcceptanceTests/NServiceBus.Encryption.MessageProperty.AcceptanceTests.csproj
@@ -12,7 +12,7 @@
     <PackageReference Include="GitHubActionsTestLogger" Version="3.0.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
     <PackageReference Include="NServiceBus.AcceptanceTesting" Version="10.1.3" />
-    <PackageReference Include="NUnit" Version="4.5.1" />
+    <PackageReference Include="NUnit" Version="4.6.0" />
     <PackageReference Include="NUnit.Analyzers" Version="4.13.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
   </ItemGroup>
diff --git a/src/Tests/NServiceBus.Encryption.MessageProperty.Tests.csproj b/src/Tests/NServiceBus.Encryption.MessageProperty.Tests.csproj
index c955314..0cce9f9 100644
--- a/src/Tests/NServiceBus.Encryption.MessageProperty.Tests.csproj
+++ b/src/Tests/NServiceBus.Encryption.MessageProperty.Tests.csproj
@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="GitHubActionsTestLogger" Version="3.0.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
-    <PackageReference Include="NUnit" Version="4.5.1" />
+    <PackageReference Include="NUnit" Version="4.6.0" />
     <PackageReference Include="NUnit.Analyzers" Version="4.13.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
     <PackageReference Include="Particular.Approvals" Version="2.0.1" />