diff --git a/Gemfile.lock b/Gemfile.lock
index a7e02f9..aa7289d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,7 +46,7 @@ GEM
     tilt (1.3.3)
     xpath (0.1.4)
       nokogiri (~> 1.3)
-    yard (0.7.5)
+    yard (0.9.20)
 
 PLATFORMS
   ruby