diff --git a/npm/webpack-dev-server/src/helpers/createReactAppHandler.ts b/npm/webpack-dev-server/src/helpers/createReactAppHandler.ts
index a99c756645c4..d0915b76265a 100644
--- a/npm/webpack-dev-server/src/helpers/createReactAppHandler.ts
+++ b/npm/webpack-dev-server/src/helpers/createReactAppHandler.ts
@@ -90,7 +90,11 @@ function addCypressToWebpackEslintRulesInPlace (webpackConfig: Configuration) {
 
   if (eslintPlugin) {
     const cypressGlobalsRules = cypressGlobals
-    .reduce((acc, global) => ({ ...acc, [global]: 'writable' }), {})
+    .reduce<Record<string, string>>((acc, global) => {
+      acc[global] = 'writable'
+
+      return acc
+    }, {})
 
     eslintPlugin.options.baseConfig = {
       ...eslintPlugin.options.baseConfig,