diff --git a/Gemfile.lock b/Gemfile.lock
index b3e650b..6b96171 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -128,7 +128,7 @@ GEM
       sparkr (>= 0.2.0)
       term-ansicolor
       yard (~> 0.8.7.5)
-    json (2.0.2)
+    json (2.3.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)