diff --git a/Gemfile.lock b/Gemfile.lock
index c7b8fc4..116bfba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -45,7 +45,7 @@ GEM
     i18n (0.7.0)
     jquery-middleman (3.1.2)
       thor (>= 0.14, < 2.0)
-    json (1.8.6)
+    json (2.3.1)
     kramdown (1.15.0)
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)