diff --git a/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests.csproj b/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests.csproj
index 2b60829..0fe50bf 100644
--- a/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests.csproj
+++ b/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.Tests.csproj
@@ -69,7 +69,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="Roslynator.Analyzers" Version="4.12.9">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.csproj b/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.csproj
index a4c268d..c67c0c9 100644
--- a/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.csproj
+++ b/src/Objectivity.AutoFixture.XUnit2.AutoNSubstitute/Objectivity.AutoFixture.XUnit2.AutoNSubstitute.csproj
@@ -94,7 +94,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="Roslynator.Analyzers" Version="4.12.9">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>