diff --git a/packages/eslint-config-react-app/index.js b/packages/eslint-config-react-app/index.js
index 74777af9b25212e7694562d5afcca17129f6b719..7689a83544b11f25a1d14ca784a700b61fbd415b 100644
--- a/packages/eslint-config-react-app/index.js
+++ b/packages/eslint-config-react-app/index.js
@@ -196,7 +196,7 @@ module.exports = {
     'react/no-deprecated': 'warn',
     'react/no-direct-mutation-state': 'warn',
     'react/no-is-mounted': 'warn',
-    'react/react-in-jsx-scope': 'warn',
+    'react/react-in-jsx-scope': 'error',
     'react/require-render-return': 'warn',
     'react/style-prop-object': 'warn',