diff --git a/Gemfile b/Gemfile
index fa535979cb..4bff00d252 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem 'benchmark'
 gem 'minitest', '5.25.1'
 gem 'pry', '0.14.2'
 gem 'rake', '13.2.1'
-gem 'rubocop', '1.65.1'
+gem 'rubocop', '1.66.1'
 gem 'rubocop-minitest', '0.36.0'
 gem 'rubocop-rake', '0.6.0'
 gem 'simplecov', '0.22.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index d822e9a1f3..c231967f38 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,16 +30,14 @@ GEM
     rainbow (3.1.1)
     rake (13.2.1)
     regexp_parser (2.9.2)
-    rexml (3.3.7)
-    rubocop (1.65.1)
+    rubocop (1.66.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.4, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.31.1, < 2.0)
+      rubocop-ast (>= 1.32.2, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.32.3)
@@ -59,7 +57,7 @@ GEM
     test-unit (3.6.2)
       power_assert
     timecop (0.9.10)
-    unicode-display_width (2.5.0)
+    unicode-display_width (2.6.0)
     yard (0.9.37)
 
 PLATFORMS
@@ -72,7 +70,7 @@ DEPENDENCIES
   minitest (= 5.25.1)
   pry (= 0.14.2)
   rake (= 13.2.1)
-  rubocop (= 1.65.1)
+  rubocop (= 1.66.1)
   rubocop-minitest (= 0.36.0)
   rubocop-rake (= 0.6.0)
   simplecov (= 0.22.0)