diff --git a/Libexec.AspnetCore.EnvironmentHeaders.Tests/Libexec.AspnetCore.EnvironmentHeaders.Tests.csproj b/Libexec.AspnetCore.EnvironmentHeaders.Tests/Libexec.AspnetCore.EnvironmentHeaders.Tests.csproj
index e453b1c..dae8545 100644
--- a/Libexec.AspnetCore.EnvironmentHeaders.Tests/Libexec.AspnetCore.EnvironmentHeaders.Tests.csproj
+++ b/Libexec.AspnetCore.EnvironmentHeaders.Tests/Libexec.AspnetCore.EnvironmentHeaders.Tests.csproj
@@ -10,7 +10,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.3" />
+        <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.4" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
         <PackageReference Include="coverlet.collector" Version="6.0.4">
           <PrivateAssets>all</PrivateAssets>