diff --git a/ApiProduct/tests/ApiProduct.FunctionalTests/ApiProduct.FunctionalTests.csproj b/ApiProduct/tests/ApiProduct.FunctionalTests/ApiProduct.FunctionalTests.csproj
index fb780f0..4472389 100644
--- a/ApiProduct/tests/ApiProduct.FunctionalTests/ApiProduct.FunctionalTests.csproj
+++ b/ApiProduct/tests/ApiProduct.FunctionalTests/ApiProduct.FunctionalTests.csproj
@@ -15,7 +15,7 @@
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     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="NSubstitute.Analyzers.CSharp" Version="1.0.16">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/ApiProduct/tests/ApiProduct.IntegrationTests/ApiProduct.IntegrationTests.csproj b/ApiProduct/tests/ApiProduct.IntegrationTests/ApiProduct.IntegrationTests.csproj
index e2b59c1..18310aa 100644
--- a/ApiProduct/tests/ApiProduct.IntegrationTests/ApiProduct.IntegrationTests.csproj
+++ b/ApiProduct/tests/ApiProduct.IntegrationTests/ApiProduct.IntegrationTests.csproj
@@ -14,7 +14,7 @@
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     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.0" />
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="NSubstitute.Analyzers.CSharp" Version="1.0.16">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/ApiProduct/tests/ApiProduct.UnitTests/ApiProduct.UnitTests.csproj b/ApiProduct/tests/ApiProduct.UnitTests/ApiProduct.UnitTests.csproj
index 90541fd..dfbd2b1 100644
--- a/ApiProduct/tests/ApiProduct.UnitTests/ApiProduct.UnitTests.csproj
+++ b/ApiProduct/tests/ApiProduct.UnitTests/ApiProduct.UnitTests.csproj
@@ -14,7 +14,7 @@
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-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="NSubstitute.Analyzers.CSharp" Version="1.0.16">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>