diff --git a/doric-android/doric/src/main/java/pub/doric/engine/DoricWebViewJSExecutor.java b/doric-android/doric/src/main/java/pub/doric/engine/DoricWebViewJSExecutor.java
index 649670c3..19a4ea3a 100644
--- a/doric-android/doric/src/main/java/pub/doric/engine/DoricWebViewJSExecutor.java
+++ b/doric-android/doric/src/main/java/pub/doric/engine/DoricWebViewJSExecutor.java
@@ -19,7 +19,6 @@ import android.annotation.SuppressLint;
 import android.content.Context;
 import android.os.Handler;
 import android.os.HandlerThread;
-import android.os.Looper;
 import android.text.TextUtils;
 import android.webkit.ConsoleMessage;
 import android.webkit.JavascriptInterface;
diff --git a/doric-android/doric/src/main/java/pub/doric/engine/JavaJSDecoder.java b/doric-android/doric/src/main/java/pub/doric/engine/JavaJSDecoder.java
index 9916f738..912c57a4 100644
--- a/doric-android/doric/src/main/java/pub/doric/engine/JavaJSDecoder.java
+++ b/doric-android/doric/src/main/java/pub/doric/engine/JavaJSDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright [2019] [Doric.Pub]
+ * Copyright [2021] [Doric.Pub]
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.