diff --git a/week3/sample_app/Gemfile.lock b/week3/sample_app/Gemfile.lock
index 6ea638c..77d67bf 100644
--- a/week3/sample_app/Gemfile.lock
+++ b/week3/sample_app/Gemfile.lock
@@ -191,7 +191,7 @@ GEM
       railties (>= 5.0)
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.3)
+    websocket-extensions (0.1.5)
 
 PLATFORMS
   ruby