diff --git a/Gemfile.lock b/Gemfile.lock
index b2c49dc..64bf504 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,7 @@ GEM
       ffi (~> 1.0, >= 1.0.11)
     diff-lcs (1.2.5)
     ffi (1.9.3)
-    json (1.8.1)
+    json (2.3.1)
     mime-types (2.2)
     mini_portile (0.5.3)
     multi_json (1.9.2)