diff --git a/exercise/simulation/webapp/public/js/package.json b/exercise/simulation/webapp/public/js/package.json
old mode 100755
new mode 100644
index 0232350..874361d
--- a/exercise/simulation/webapp/public/js/package.json
+++ b/exercise/simulation/webapp/public/js/package.json
@@ -36,7 +36,7 @@
   "devDependencies": {
     "coveralls": "^2.11.2",
     "docco": "*",
-    "eslint": "1.10.x",
+    "eslint": "6.6.x",
     "gzip-size-cli": "^1.0.0",
     "karma": "^0.13.13",
     "karma-qunit": "~2.0.1",