diff --git a/Gemfile.lock b/Gemfile.lock
index e39e564..b0bf624 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -67,7 +67,7 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (1.1.0)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.5.1)
     loofah (2.2.2)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)