diff --git a/src/config.ts b/src/config.ts
index 33fc689..153c297 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -1,7 +1,7 @@
 export const DEFAULT_LANGUAGE: LanguageKeys = "ru";
 
 /* Show banner about website development */
-export const IS_SITE_UNDER_CONSTRUCTION = import.meta.env.IS_SITE_UNDER_CONSTRUCTION || true;
+export const IS_SITE_UNDER_CONSTRUCTION = import.meta.env.IS_SITE_UNDER_CONSTRUCTION === "true" ? true : false;
 
 export const SITE_METADATA: SiteMetadataType = {
 	title: "Sergey Yarkov",
diff --git a/src/env.d.ts b/src/env.d.ts
new file mode 100644
index 0000000..a9348fd
--- /dev/null
+++ b/src/env.d.ts
@@ -0,0 +1,3 @@
+interface ImportMetaEnv {
+	readonly IS_SITE_UNDER_CONSTRUCTION: string;
+}