diff --git a/Gemfile.lock b/Gemfile.lock
index 186dc02..5bdf4c0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
       git (>= 1.2.5)
       rake
       rdoc
-    json (1.5.1)
+    json (1.5.5)
     rake (0.9.2.2)
     rcov (0.9.9)
     rdoc (3.12)