diff --git a/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs b/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs
index f23f4bb803..eb0436c5ff 100644
--- a/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs
+++ b/modules/docs/src/Volo.Docs.Web/Bundling/PrismjsStyleBundleContributorDocsExtension.cs
@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Linq;
 using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Docs.Bundling
@@ -8,11 +7,7 @@ namespace Volo.Docs.Bundling
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            var prismCss = context.Files.FirstOrDefault(x => x.FileName == "/libs/prismjs/themes/prism.css");
-            if (prismCss != null)
-            {
-                prismCss.FileName = "/libs/prismjs/themes/prism-okaidia.css";
-            }
+            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");
             context.Files.AddIfNotContains("/libs/prismjs/plugins/diff-highlight/prism-diff-highlight.css");