diff --git a/src/main/java/com/lovenav/utils/QRCodeUtil.java b/src/main/java/com/lovenav/utils/QRCodeUtil.java
index 5344a52..5556877 100644
--- a/src/main/java/com/lovenav/utils/QRCodeUtil.java
+++ b/src/main/java/com/lovenav/utils/QRCodeUtil.java
@@ -474,7 +474,7 @@ public class QRCodeUtil {
     }
 
     public static String delete_profix(String base64){
-        String delete = "data:image/jpg;base64,";
+        String delete = "data:image/png;base64,";
         String Base64 = base64;
         return(base64.replace(delete,""));
     }