diff --git a/Gemfile.lock b/Gemfile.lock
index bcb2955..4bcccc6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -116,7 +116,7 @@ GEM
       concurrent-ruby (~> 1.0)
     jbuilder (2.9.1)
       activesupport (>= 4.2.0)
-    json (2.2.0)
+    json (2.3.1)
     jwt (2.2.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)