diff --git a/core/.eslintrc.js b/core/.eslintrc.js
index c46cb61d00..01afd23ef7 100644
--- a/core/.eslintrc.js
+++ b/core/.eslintrc.js
@@ -33,7 +33,7 @@ module.exports = {
     "@typescript-eslint/no-non-null-assertion": "off",
     "no-case-declarations": "off",
     "@typescript-eslint/strict-boolean-expressions": [
-      "warn",
+      "error",
       {
         "allowNullableBoolean": true,
         "allowNullableString": true,