diff --git a/backend/server.js b/backend/server.js
index e8d68d3..0999ceb 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -69,6 +69,7 @@ function verifyAuthToken(authToken){
     }
     if(!authenticatedUser) return false;
     if(authenticatedUser.token !== authToken) return false;
+    if(authenticatedUser.expires_at <= new Date().valueOf()) return false;
     return authenticatedUser; 
 }