diff --git a/Tests/UnitTestImpromptuInterface.Clay/UnitTestImpromptuInterface.Clay.csproj b/Tests/UnitTestImpromptuInterface.Clay/UnitTestImpromptuInterface.Clay.csproj
index 0ed87ee6..0f81840f 100644
--- a/Tests/UnitTestImpromptuInterface.Clay/UnitTestImpromptuInterface.Clay.csproj
+++ b/Tests/UnitTestImpromptuInterface.Clay/UnitTestImpromptuInterface.Clay.csproj
@@ -39,7 +39,7 @@
     <PackageReference Include="Castle.Core" Version="1.1.*" />
     <PackageReference Include="Castle.DynamicProxy" Version="2.1.*" />
     <PackageReference Include="IronPython" Version="2.7.*" />
-    <PackageReference Include="log4net" Version="1.2.10" />
+    <PackageReference Include="log4net" Version="3.3.0" />
     <PackageReference Include="NUnit" Version="3.7.1" />
     <PackageReference Include="Clay" Version="1.0" />
   </ItemGroup>