diff --git a/libs/core-styles/src/bin/config.js b/libs/core-styles/src/bin/config.js
index 1efc9d288..3448f9afb 100755
--- a/libs/core-styles/src/bin/config.js
+++ b/libs/core-styles/src/bin/config.js
@@ -31,7 +31,7 @@ function config(customConfigFiles = [], cssVersion) {
     newJson = getConfigObject(nextFile);
     configObjects.push(newJson);
   });
-  mergedJson = merge(...configObjects);
+  const mergedJson = merge(...configObjects);
 
   // Update version property
   const updatedJson = updateVersion(mergedJson, cssVersion);