diff --git a/Gemfile.lock b/Gemfile.lock
index 8b5565c..6a0f75f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
     mocha (1.14.0)
     multi_json (1.15.0)
     multipart-post (2.2.3)
-    os (1.1.1)
+    os (1.1.4)
     parallel (1.22.1)
     parser (3.1.2.0)
       ast (~> 2.4.1)