diff --git a/package-lock.json b/package-lock.json
index e6d121c4cc..61286b6b94 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -114,9 +114,9 @@
       }
     },
     "coffeescript": {
-      "version": "1.12.7",
-      "resolved": "https://registry.npmjs.org/coffeescript/-/coffeescript-1.12.7.tgz",
-      "integrity": "sha512-pLXHFxQMPklVoEekowk8b3erNynC+DVJzChxS/LCBBgR6/8AJkHivkm//zbowcfc7BTCAjryuhx6gPqPRfsFoA==",
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/coffeescript/-/coffeescript-2.4.1.tgz",
+      "integrity": "sha512-34GV1aHrsMpTaO3KfMJL40ZNuvKDR/g98THHnE9bQj8HjMaZvSrLik99WWqyMhRtbe8V5hpx5iLgdcSvM/S2wg==",
       "dev": true
     },
     "combined-stream": {
diff --git a/package.json b/package.json
index 36ae622d67..1fddb25a86 100644
--- a/package.json
+++ b/package.json
@@ -94,7 +94,7 @@
   },
   "devDependencies": {
     "chrome-webstore-upload": "^0.2.2",
-    "coffeescript": "=1.12.7",
+    "coffeescript": "=2.4.1",
     "esprima": "^4.0.1",
     "font-awesome": "=4.7.0",
     "jshint": "^2.10.2",
diff --git a/src/meta/jshint.json b/src/meta/jshint.json
index 1b58dc59c8..5cb29cfacd 100644
--- a/src/meta/jshint.json
+++ b/src/meta/jshint.json
@@ -1,4 +1,5 @@
 {
+  "esversion": 6,
   "undef":   true,
   "unused":  true,
   "eqnull":  true,
@@ -13,6 +14,7 @@
   "-W084": true,
   "-W083": true,
   "-W093": true,
+  "-W032": true,
   "globals": {
     "MediaError":   false,
     "Set":          false,