diff --git a/lib/library-ext.d.ts b/lib/library-ext.d.ts
new file mode 100644
index 000000000..0fe96c42f
--- /dev/null
+++ b/lib/library-ext.d.ts
@@ -0,0 +1,7 @@
+import { User } from './models'
+
+declare module 'express' {
+  export interface Request {
+    user?: User;
+  }
+}