diff --git a/presentations/join-the-ruby-line/todo/Gemfile.lock b/presentations/join-the-ruby-line/todo/Gemfile.lock
index 4e2ca11..e93bba1 100644
--- a/presentations/join-the-ruby-line/todo/Gemfile.lock
+++ b/presentations/join-the-ruby-line/todo/Gemfile.lock
@@ -141,7 +141,7 @@ GEM
     websocket (1.2.1)
     websocket-driver (0.5.1)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.1)
+    websocket-extensions (0.1.5)
     xpath (2.0.0)
       nokogiri (~> 1.3)
     yui-compressor (0.12.0)