diff --git a/Gemfile.lock b/Gemfile.lock
index 0306d76..e489572 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,13 +86,11 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (2.2.0)
-    webrick (1.7.0)
     websocket (1.2.9)
     websocket-client-simple (0.5.1)
       event_emitter
       websocket
-    yard (0.9.28)
-      webrick (~> 1.7.0)
+    yard (0.9.35)
 
 PLATFORMS
   ruby