diff --git a/Gemfile.lock b/Gemfile.lock
index 4fabc36..fdb8517 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
       hobbit
     i18n (0.7.0)
     jaro_winkler (1.5.3)
-    json (2.1.0)
+    json (2.3.1)
     mailchimp-api (2.0.6)
       excon (>= 0.16.0)
       json (>= 1.7.7)