diff --git a/Gemfile.lock b/Gemfile.lock
index 4fbeb90..3089ba8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -190,16 +190,16 @@ GEM
     regexp_parser (2.0.0)
     rexml (3.2.4)
     rouge (3.25.0)
-    rubocop (1.4.2)
+    rubocop (1.5.1)
       parallel (~> 1.10)
       parser (>= 2.7.1.5)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8)
+      regexp_parser (>= 2.0)
       rexml
-      rubocop-ast (>= 1.1.1)
+      rubocop-ast (>= 1.2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (1.2.0)
+    rubocop-ast (1.3.0)
       parser (>= 2.7.1.5)
     ruby-enum (0.8.0)
       i18n