diff --git a/Gemfile.lock b/Gemfile.lock
index f5b8881..a31b981 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -160,7 +160,7 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.2.0)
+    json (2.3.1)
     launchy (2.4.3)
       addressable (~> 2.3)
     letter_opener (1.7.0)