diff --git a/server/web3bcspider/services/pull_bcevent.js b/server/web3bcspider/services/pull_bcevent.js
index 4af72e6..0d4865e 100644
--- a/server/web3bcspider/services/pull_bcevent.js
+++ b/server/web3bcspider/services/pull_bcevent.js
@@ -239,7 +239,7 @@ class PullBcEvent extends BaseService {
   }
 
   async calcHashCode(data) {
-    return utils.sha1Str(data.toLowerCase().split("").sort().join(''));
+    return utils.sha1Str(data.toLowerCase().split('').sort().join(''));
   }
 
 }