diff --git a/chatdesk-ui/global.d.ts b/chatdesk-ui/global.d.ts
new file mode 100644
index 0000000..a60bbf1
--- /dev/null
+++ b/chatdesk-ui/global.d.ts
@@ -0,0 +1,8 @@
+// types/global.d.ts
+export {};
+
+declare global {
+  interface Window {
+    RUNTIME_ENV?: Record<string, string>;
+  }
+}