diff --git a/hello_app/Gemfile.lock b/hello_app/Gemfile.lock
index 5357939..44a3bb5 100644
--- a/hello_app/Gemfile.lock
+++ b/hello_app/Gemfile.lock
@@ -164,7 +164,7 @@ GEM
       railties (>= 5.0)
     websocket-driver (0.6.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.4)
+    websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)