diff --git a/.eslintrc.json b/.eslintrc.json
index f392f55b0..8a0166333 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,76 +1,77 @@
 {
   "root": true,
   "env": {
     "es6": true
   },
   "extends": [
     "eslint:recommended",
     "plugin:react/recommended",
     "plugin:flowtype/recommended",
     "plugin:import/errors",
     "plugin:import/warnings",
     "plugin:prettier/recommended",
     "prettier"
   ],
   "parser": "babel-eslint",
   "plugins": ["react", "react-hooks", "flowtype", "monorepo", "import"],
   "rules": {
     // Prettier is configured to keep lines to 80 chars, but there are two issues:
     // - It doesn't handle comments (leaves them as-is)
     // - It makes all import statements take one line (reformats them)
     // We want ESLint to warn us in the first case, but not in the second case
     // since Prettier forces us in the second case. By setting code to 420, we
     // make sure ESLint defers to Prettier for import statements.
     "max-len": ["error", { "code": 420, "comments": 80, "ignoreUrls": true }],
     "flowtype/require-valid-file-annotation": ["error", "always"],
     "flowtype/require-exact-type": ["error", "never"],
     "curly": "error",
     "linebreak-style": "error",
     "semi": "error",
     "react-hooks/rules-of-hooks": "error",
     "react-hooks/exhaustive-deps": "warn",
     "monorepo/no-relative-import": "error",
     "no-empty": ["error", { "allowEmptyCatch": true }],
     "import/no-unresolved": 0,
     "no-unused-vars": ["error", { "ignoreRestSiblings": true }],
     "react/prop-types": ["error", { "skipUndeclared": true }],
     "no-shadow": 1,
+    "no-var": "error",
     "import/order": [
       "warn",
       {
         "newlines-between": "always",
         "alphabetize": {
           "order": "asc",
           "caseInsensitive": true
         },
         "groups": [["builtin", "external"], "internal"]
       }
     ],
     "prefer-const": "error",
     "react/jsx-curly-brace-presence": [
       "error",
       { "props": "never", "children": "ignore" }
     ],
     "eqeqeq": ["error", "always"]
   },
   "settings": {
     "react": {
       "version": "detect"
     },
     "import/ignore": ["react-native"],
     "import/internal-regex": "^(lib|native|keyserver|web)/"
   },
   "overrides": [
     {
       "files": "*.cjs",
       "env": {
         "node": true,
         "commonjs": true
       },
       "rules": {
         "flowtype/require-valid-file-annotation": 0,
         "flowtype/require-exact-type": 0
       }
     }
   ]
 }