diff --git a/Gemfile.lock b/Gemfile.lock
index 32f9a5f..ba27dfc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       concurrent-ruby (~> 1.0)
     jbuilder (2.9.1)
       activesupport (>= 4.2.0)
-    json (2.2.0)
+    json (2.3.1)
     launchy (2.4.3)
       addressable (~> 2.3)
     listen (3.1.5)