diff --git a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java
index df04e9a9d7..56f31125c5 100644
--- a/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java
+++ b/dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/Constants.java
@@ -299,7 +299,7 @@ public final class Constants {
     /**
      * user name regex
      */
-    public static final Pattern REGEX_USER_NAME = Pattern.compile("^[a-zA-Z0-9._-]{3,20}$");
+    public static final Pattern REGEX_USER_NAME = Pattern.compile("^[a-zA-Z0-9._-]{3,39}$");
 
     /**
      * email regex