diff --git a/Gemfile.lock b/Gemfile.lock
index b62bbd9..fa381a4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -23,7 +23,7 @@ GEM
     diff-lcs (1.3)
     docile (1.1.5)
     i18n (0.8.4)
-    json (2.1.0)
+    json (2.5.1)
     method_source (0.8.2)
     minitest (5.10.2)
     pry (0.10.4)