diff --git a/package.json b/package.json
index 6e93256..6f98927 100644
--- a/package.json
+++ b/package.json
@@ -20,9 +20,9 @@
   ],
   "devDependencies": {
     "assert": "1.4.1",
-    "eslint": "2.9.0",
+    "eslint": "^5.16.0",
     "eslint-config-wikimedia": "0.3.0",
-    "mocha": "^2.5.3"
+    "mocha": "^6.1.4"
   },
   "repository": {
     "type": "git",