diff --git a/src/Gemfile.lock b/src/Gemfile.lock
index 6864234..ac85ea8 100644
--- a/src/Gemfile.lock
+++ b/src/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     diff-lcs (1.2.5)
     haml (4.0.7)
       tilt
-    json (2.0.2)
+    json (2.3.0)
     multi_json (1.12.1)
     rack (1.6.5)
     rack-protection (1.5.3)