diff --git a/core/.eslintrc.json b/core/.eslintrc.json
index b0be57c..a87e36c 100644
--- a/core/.eslintrc.json
+++ b/core/.eslintrc.json
@@ -18,14 +18,21 @@
     "CKEDITOR": true
   },
   "rules": {
+    // Override.
+    "consistent-return": [0],
+    "no-underscore-dangle": [0],
     // Warnings.
     "max-nested-callbacks": [1, 3],
+    "no-mutable-exports": [1],
+    "no-plusplus": [1, {
+      "allowForLoopAfterthoughts": true
+    }],
     "valid-jsdoc": [1, {
       "prefer": {
         "returns": "return",
         "property": "prop"
       },
       "requireReturn": false
-    }]
+    }],
   }
 }