diff --git a/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsScriptBundleContributorDocsExtension.cs b/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsScriptBundleContributorDocsExtension.cs
index 9309234be7..307720a87f 100644
--- a/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsScriptBundleContributorDocsExtension.cs
+++ b/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsScriptBundleContributorDocsExtension.cs
@@ -22,7 +22,8 @@ namespace Volo.Docs.Bundling
             "sass",
             "scss",
             "sql",
-            "typescript"
+            "typescript",
+            "diff"
         };
 
         public override void ConfigureBundle(BundleConfigurationContext context)