diff --git a/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs b/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs
index 9cbe1bd04c..9cfde60fa4 100644
--- a/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs
+++ b/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs
@@ -7,8 +7,9 @@ namespace Volo.Docs.Bundling
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
+            context.Files.ReplaceOne("/libs/prismjs/themes/prism.css","/libs/prismjs/themes/prism-okaidia.css");
             context.Files.AddIfNotContains("/libs/prismjs/plugins/line-highlight/prism-line-highlight.css");
             context.Files.AddIfNotContains("/libs/prismjs/plugins/toolbar/prism-toolbar.css");
         }
     }
-}
\ No newline at end of file
+}