diff --git a/Gemfile b/Gemfile
index 295e0a81..df14ad54 100644
--- a/Gemfile
+++ b/Gemfile
@@ -57,7 +57,7 @@ group :development do
   # Show mails via Web browser
   gem 'letter_opener_web', '~> 2.0'
   # Check code style
-  gem 'rubocop', '~> 1.50', require: false
+  gem 'rubocop', '~> 1.64', require: false
 end
 
 group :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index ef55cf8e..569deb1e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -176,7 +176,7 @@ GEM
       racc (~> 1.4)
     orm_adapter (0.5.0)
     parallel (1.24.0)
-    parser (3.3.0.5)
+    parser (3.3.2.0)
       ast (~> 2.4.1)
       racc
     pg (1.5.6)
@@ -189,7 +189,7 @@ GEM
     public_suffix (5.0.5)
     puma (5.6.8)
       nio4r (~> 2.0)
-    racc (1.7.3)
+    racc (1.8.0)
     rack (2.2.9)
     rack-test (2.1.0)
       rack (>= 1.3)
@@ -230,11 +230,12 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    regexp_parser (2.9.0)
+    regexp_parser (2.9.2)
     responders (3.1.1)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.2.6)
+    rexml (3.2.8)
+      strscan (>= 3.0.9)
     rspec-core (3.13.0)
       rspec-support (~> 3.13.0)
     rspec-expectations (3.13.0)
@@ -252,7 +253,7 @@ GEM
       rspec-mocks (~> 3.13)
       rspec-support (~> 3.13)
     rspec-support (3.13.1)
-    rubocop (1.63.2)
+    rubocop (1.64.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -263,8 +264,8 @@ GEM
       rubocop-ast (>= 1.31.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.31.2)
-      parser (>= 3.3.0.4)
+    rubocop-ast (1.31.3)
+      parser (>= 3.3.1.0)
     ruby-progressbar (1.13.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
@@ -287,6 +288,7 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
+    strscan (3.1.0)
     thor (1.3.1)
     tilt (2.3.0)
     timeout (0.4.1)
@@ -334,7 +336,7 @@ DEPENDENCIES
   rails (~> 6.1.7)
   rails-controller-testing (~> 1.0)
   rspec-rails (~> 6.0)
-  rubocop (~> 1.50)
+  rubocop (~> 1.64)
   sass-rails (~> 6.0)
   spring
   spring-watcher-listen (~> 2.1)