diff --git a/Gemfile.lock b/Gemfile.lock
index f641b90..8d31ba6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,7 +35,7 @@ GEM
     ffi (1.13.1)
     i18n (1.8.5)
       concurrent-ruby (~> 1.0)
-    json (2.1.0)
+    json (2.5.0)
     listen (3.3.3)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)