diff --git a/Gemfile.lock b/Gemfile.lock
index 017fd23..8d2e0f5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,7 +11,7 @@ GEM
       json (>= 1.2.0)
       multipart-post (>= 1.1.0)
       oauth (>= 0.3.6)
-    json (1.5.3)
+    json (2.2.0)
     multipart-post (1.1.3)
     oauth (0.4.5)