diff --git a/Gemfile b/Gemfile
index 95edcdf..7a1e170 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gemspec
 group :development do
   gem "bundler-audit", "~> 0.9"
   gem "rake", "~> 13.4"
-  gem "rubocop", "~> 1.90"
+  gem "rubocop", "~> 1.91"
   gem "rubocop-minitest", "~> 0.40"
   gem "rubocop-rake", "~> 0.7"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index f3aee2f..55239d8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,7 +49,7 @@ GEM
     rake (13.4.2)
     regexp_parser (2.12.0)
     rexml (3.4.4)
-    rubocop (1.90.0)
+    rubocop (1.91.0)
       json (>= 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -93,7 +93,7 @@ DEPENDENCIES
   minitest-reporters (~> 1.8)
   mocha (~> 3.1)
   rake (~> 13.4)
-  rubocop (~> 1.90)
+  rubocop (~> 1.91)
   rubocop-minitest (~> 0.40)
   rubocop-rake (~> 0.7)
   simplecov (~> 1.1)