diff --git a/002_source/cms/src/lib/check-is-development.ts b/002_source/cms/src/lib/check-is-development.ts
index 0da912c..ecb1f12 100644
--- a/002_source/cms/src/lib/check-is-development.ts
+++ b/002_source/cms/src/lib/check-is-development.ts
@@ -1,2 +1,2 @@
-const isDevelopment = process.env.NEXT_PUBLIC_ENVIRONMENT === 'development';
+const isDevelopment: boolean = process.env.NEXT_PUBLIC_ENVIRONMENT === 'development';
 export default isDevelopment;