diff --git a/Gemfile.lock b/Gemfile.lock
index 40a9c43d..1518644c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -286,7 +286,7 @@ GEM
     unicode-display_width (1.8.0)
     uri (0.13.0)
     verbal_expressions (0.1.5)
-    wdm (0.1.1)
+    wdm (0.2.0)
     webrick (1.8.1)
 
 PLATFORMS