diff --git a/mkdocs.yml b/mkdocs.yml
index 6487af83092..911823c348b 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -150,7 +150,7 @@ extra:
     tag: v3.4.0
   explorer:
     release: 3.1.0
-    branch: reelase-3.1
+    branch: release-3.1
     tag: v3.1.0
   exchange_ent:
     release: 3.0.0