diff --git a/Gemfile.lock b/Gemfile.lock
index f1170e1..cf45e50 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,7 +58,7 @@ GEM
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     jaro_winkler (1.5.2)
-    json (2.2.0)
+    json (2.3.1)
     loofah (2.2.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)