diff --git a/Gemfile.lock b/Gemfile.lock
index 112bb89..20c78bc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -124,7 +124,7 @@ GEM
     jbuilder (2.8.0)
       activesupport (>= 4.2.0)
       multi_json (>= 1.2)
-    json (2.2.0)
+    json (2.5.1)
     jwt (1.5.6)
     knock (2.1.1)
       bcrypt (~> 3.1)