diff --git a/Gemfile b/Gemfile
index 0c44d8b..4cd63b1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'minitest-ci', '~> 3.4'
 gem 'minitest-reporters', '~> 1.3'
 gem 'rake', '~> 13.0'
 gem 'rake-compiler', '~> 1.2'
-gem 'rubocop', '1.36.0'
+gem 'rubocop', '1.39.0'
 gem 'rubocop-minitest', '0.22.1'
 gem 'rubocop-packaging', '0.5.2'
 gem 'rubocop-performance', '1.15.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 327328e..0f651a3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,25 +19,25 @@ GEM
       minitest (>= 5.0)
       ruby-progressbar
     parallel (1.22.1)
-    parser (3.1.2.1)
+    parser (3.1.3.0)
       ast (~> 2.4.1)
     rainbow (3.1.1)
     rake (13.0.6)
     rake-compiler (1.2.0)
       rake
-    regexp_parser (2.5.0)
+    regexp_parser (2.6.1)
     rexml (3.2.5)
-    rubocop (1.36.0)
+    rubocop (1.39.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.2.1)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.20.1, < 2.0)
+      rubocop-ast (>= 1.23.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.21.0)
+    rubocop-ast (1.24.0)
       parser (>= 3.1.1.0)
     rubocop-minitest (0.22.1)
       rubocop (>= 0.90, < 2.0)
@@ -61,7 +61,7 @@ DEPENDENCIES
   minitest-reporters (~> 1.3)
   rake (~> 13.0)
   rake-compiler (~> 1.2)
-  rubocop (= 1.36.0)
+  rubocop (= 1.39.0)
   rubocop-minitest (= 0.22.1)
   rubocop-packaging (= 0.5.2)
   rubocop-performance (= 1.15.0)