diff --git a/Gemfile.lock b/Gemfile.lock
index 281bb3b..7cf705a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -162,8 +162,8 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.2.0)
-    json (2.2.0-java)
+    json (2.3.1)
+    json (2.3.1-java)
     libv8 (7.3.492.27.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)