diff --git a/Gemfile.lock b/Gemfile.lock
index 56acaac7..c7bd84fd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
     http_parser.rb (0.6.0)
     i18n (1.8.7)
       concurrent-ruby (~> 1.0)
-    json (2.3.1)
+    json (2.5.1)
     kgio (2.11.3)
     kramdown (2.3.1)
       rexml
@@ -166,4 +166,4 @@ DEPENDENCIES
   rubygems-update
   sinatra
   sinatra-contrib
-  unicorn
\ No newline at end of file
+  unicorn