diff --git a/package.json b/package.json
index 006858c..99f8692 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "test": "eslint simpleheat.js"
   },
   "devDependencies": {
-    "eslint": "^3.13.1",
+    "eslint": "^6.5.1",
     "eslint-config-mourner": "^2.0.1"
   },
   "eslintConfig": {