diff --git a/Gemfile.lock b/Gemfile.lock
index 13489a08..610a9fec 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
     httpclient (2.8.3)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.5.1)
     minitest (5.11.3)
     molinillo (0.6.6)
     nanaimo (0.2.6)