diff --git a/Gemfile.lock b/Gemfile.lock
index e02b257..642c755 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -148,7 +148,7 @@ GEM
     httpclient (2.8.3)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.3.1)
     jwt (2.1.0)
     kramdown (1.16.2)
     little-plugger (1.1.4)