diff --git a/.eslintrc.js b/.eslintrc.js
index 8143b09..202bd69 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -1,15 +1,16 @@
 module.exports = {
-  env: {
-    commonjs: true,
-    es2021: true,
-    node: true,
-  },
-  extends: [
-    'airbnb-base',
-  ],
-  parserOptions: {
-    ecmaVersion: 'latest',
-  },
-  rules: {
-  },
+    env: {
+        commonjs: true,
+        es2021: true,
+        node: true,
+    },
+    extends: [
+        'airbnb-base',
+    ],
+    parserOptions: {
+        ecmaVersion: 'latest',
+    },
+    rules: {
+        indent: ['error', 4],
+    },
 };