diff --git a/Gemfile.lock b/Gemfile.lock
index 4b5315f..97e71a6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,7 +17,7 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
-    json (2.2.0)
+    json (2.3.1)
     method_source (0.9.2)
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)