diff --git a/src/Directory.Packages.props b/src/Directory.Packages.props
index 3734c49174..77ba448e2f 100644
--- a/src/Directory.Packages.props
+++ b/src/Directory.Packages.props
@@ -33,6 +33,7 @@
     <PackageVersion Include="ModelContextProtocol.AspNetCore" Version="1.3.0" />
     <PackageVersion Include="ModelContextProtocol.Core" Version="1.3.0" />
     <PackageVersion Include="Microsoft.AspNetCore.OpenApi" Version="10.0.8" />
+    <PackageVersion Include="Microsoft.OpenApi" Version="2.7.5" />
     <PackageVersion Include="Mt32emu.net" Version="1.0.0" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="NSubstitute.Analyzers.CSharp" Version="1.0.17" />
diff --git a/tests/Directory.Packages.props b/tests/Directory.Packages.props
index ff6d949310..12a723069b 100644
--- a/tests/Directory.Packages.props
+++ b/tests/Directory.Packages.props
@@ -9,6 +9,7 @@
     <PackageVersion Include="FluentAssertions" Version="8.10.0" />
     <PackageVersion Include="JetBrains.Annotations" Version="2025.2.4" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0" />
+    <PackageVersion Include="Microsoft.OpenApi" Version="2.7.5" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
     <PackageVersion Include="NSubstitute.Analyzers.CSharp" Version="1.0.17" />