diff --git a/docs/sidebar.json b/docs/sidebar.json
index cc9146cfc3..ef76affe22 100644
--- a/docs/sidebar.json
+++ b/docs/sidebar.json
@@ -161,7 +161,7 @@
       },
       {
         "label": "Get Started with Extensions",
-        "slug": "docs/extensions/getting-started-extensions.md"
+        "slug": "docs/extensions/getting-started-extensions"
       },
       {
         "label": "Extension Releasing",