diff --git a/Gemfile.lock b/Gemfile.lock
index 4851d3e..967cbdb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -66,9 +66,7 @@ GEM
     test-unit (3.5.3)
       power_assert
     unicode-display_width (2.1.0)
-    webrick (1.7.0)
-    yard (0.9.28)
-      webrick (~> 1.7.0)
+    yard (0.9.36)
 
 PLATFORMS
   ruby