diff --git a/package.json b/package.json
index 01d441e..f29330b 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   },
   "devDependencies": {
     "del": "^3.0.0",
-    "event-stream": "^4.0.1",
+    "event-stream": "3.3.4",
     "gulp": "^4.0.0",
     "gulp-iconfont": "^10.0.2",
     "mocha": "^5.2.0",