diff --git a/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/Singleton.java b/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/Singleton.java
index edb83a57..4e5ef959 100644
--- a/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/Singleton.java
+++ b/hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/Singleton.java
@@ -43,7 +43,6 @@ public final class Singleton {
         return result == null ? null : (T) result;
     }
 
-
     /**
      * Get a singleton object by key.
      *