diff --git a/apps/backend/src/common/types/express/index.d.ts b/apps/backend/src/common/types/express/index.d.ts
new file mode 100644
index 0000000..7f007f9
--- /dev/null
+++ b/apps/backend/src/common/types/express/index.d.ts
@@ -0,0 +1,9 @@
+import { AuthUser } from "src/auth/decorator/current-user.decorator";
+
+declare global {
+  namespace Express {
+    interface Request {
+      user?: AuthUser;
+    }
+  }
+}
\ No newline at end of file