diff --git a/.eslintrc.es5.json b/.eslintrc.es5.json
index 70b87f9e2f..e642534dff 100644
--- a/.eslintrc.es5.json
+++ b/.eslintrc.es5.json
@@ -5,7 +5,8 @@
     "browser": true
   },
   "parserOptions": {
-    "ecmaVersion": 5
+    "ecmaVersion": 6,
+    "sourceType": "module"
   },
   "rules": {
     "no-underscore-dangle": 0 // Backbone uses underscores, we cannot remove them
diff --git a/.eslintrc.tests.json b/.eslintrc.tests.json
index cbfd3d5ad2..ac205e9e54 100644
--- a/.eslintrc.tests.json
+++ b/.eslintrc.tests.json
@@ -5,7 +5,8 @@
     "mocha": true
   },
   "parserOptions": {
-    "ecmaVersion": 6
+    "ecmaVersion": 6,
+    "sourceType": "module"
   },
   "rules": {
     "no-only-tests/no-only-tests": 2,