diff --git a/app/package.json b/app/package.json
index 01ca198..67cf82b 100644
--- a/app/package.json
+++ b/app/package.json
@@ -21,7 +21,7 @@
     "webpack-cli": "3.3.11",
     "webpack-dev-server": "3.10.3",
     "worker-loader": "2.0.0",
-    "yarn": "1.22.4"
+    "yarn": "1.22.13"
   },
   "scripts": {
     "clean": "rm -rf ./build",