diff --git a/Gemfile.lock b/Gemfile.lock
index 73bd52d..3892894 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
     gherkin (2.7.6)
       json (>= 1.4.6)
     i18n (0.6.0)
-    json (1.6.5)
+    json (2.3.1)
     metaclass (0.0.1)
     minitest (2.11.0)
     mocha (0.10.3)