diff --git a/csharp/codebehind/web.csproj b/csharp/codebehind/web.csproj
index 9a293da923d..bee94bbf76d 100644
--- a/csharp/codebehind/web.csproj
+++ b/csharp/codebehind/web.csproj
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="CodeBehind" Version="3.9.2" />
+    <PackageReference Include="CodeBehind" Version="4.0.0" />
   </ItemGroup>
 
 </Project>