diff --git a/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Integration.Test/BackendConfiguration.Pn.Integration.Test.csproj b/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Integration.Test/BackendConfiguration.Pn.Integration.Test.csproj
index 8cec64f7..255b6a27 100644
--- a/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Integration.Test/BackendConfiguration.Pn.Integration.Test.csproj
+++ b/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Integration.Test/BackendConfiguration.Pn.Integration.Test.csproj
@@ -11,7 +11,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-        <PackageReference Include="NSubstitute" Version="5.1.0" />
+        <PackageReference Include="NSubstitute" Version="5.3.0" />
         <PackageReference Include="NUnit" Version="3.14.0" />
         <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
         <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
diff --git a/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Test/BackendConfiguration.Pn.Test.csproj b/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Test/BackendConfiguration.Pn.Test.csproj
index 82bb67e0..b89e9208 100644
--- a/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Test/BackendConfiguration.Pn.Test.csproj
+++ b/eFormAPI/Plugins/BackendConfiguration.Pn/BackendConfiguration.Pn.Test/BackendConfiguration.Pn.Test.csproj
@@ -9,7 +9,7 @@
 
     <ItemGroup>
       <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-      <PackageReference Include="NSubstitute" Version="5.1.0" />
+      <PackageReference Include="NSubstitute" Version="5.3.0" />
       <PackageReference Include="NUnit" Version="3.14.0" />
       <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
       <PackageReference Include="Testcontainers" Version="4.1.0" />