diff --git a/Gemfile.lock b/Gemfile.lock
index ed8aaff..9f58c91 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -159,7 +159,8 @@ GEM
     rspec-puppet (2.11.1)
       rspec
     rspec-support (3.11.0)
-    rubocop (1.31.0)
+    rubocop (1.31.1)
+      json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)