diff --git a/Gemfile.lock b/Gemfile.lock
index 0034640..44533ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -192,7 +192,7 @@ GEM
     regexp_parser (2.1.1)
     rexml (3.2.5)
     rouge (3.26.0)
-    rubocop (1.14.0)
+    rubocop (1.15.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)