diff --git a/plugins/mysql/index.py b/plugins/mysql/index.py
index ba0f330db..09e98f6a9 100755
--- a/plugins/mysql/index.py
+++ b/plugins/mysql/index.py
@@ -446,7 +446,7 @@ def getShowLogFile():
 
 
 def getMdb8Ver():
-    return ['8.0','8.1','8.2','8.3','8.4','9.0',"9.1","9.2","9.3","9.4"]
+    return ['8.0','8.1','8.2','8.3','8.4','9.0','9.1', '9.2', '9.3', '9.4']
 
 
 def getSlaveName():