diff --git a/Gemfile.lock b/Gemfile.lock
index 4b799fc..cf875c2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,7 +46,7 @@ GEM
     i18n (1.8.2)
       concurrent-ruby (~> 1.0)
     invoca-utils (0.3.0)
-    json (2.1.0)
+    json (2.5.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)