diff --git a/Gemfile.lock b/Gemfile.lock
index aeea0f1..94ec286 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,11 +59,11 @@ GEM
     mini_mime (1.1.5)
     multi_test (1.1.0)
     open4 (1.3.4)
-    parallel (1.25.1)
-    parser (3.3.2.0)
+    parallel (1.26.3)
+    parser (3.3.4.2)
       ast (~> 2.4.1)
       racc
-    racc (1.8.0)
+    racc (1.8.1)
     rainbow (3.1.1)
     rake (13.2.1)
     regexp_parser (2.9.2)
@@ -82,18 +82,17 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.1)
-    rubocop (1.64.1)
+    rubocop (1.66.0)
       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 (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.31.1, < 2.0)
+      regexp_parser (>= 2.4, < 3.0)
+      rubocop-ast (>= 1.32.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.31.3)
+    rubocop-ast (1.32.1)
       parser (>= 3.3.1.0)
     ruby-progressbar (1.13.0)
     rubyzip (2.3.2)
@@ -117,7 +116,7 @@ DEPENDENCIES
   aruba (~> 0.6.2)
   rake (~> 13.2.0)
   rspec (~> 3.13.0)
-  rubocop (~> 1.64.1)
+  rubocop (~> 1.66.0)
   simplecov (~> 0.22.0)
   tetra!
 
diff --git a/tetra.gemspec b/tetra.gemspec
index cf2d429..f74f1bf 100644
--- a/tetra.gemspec
+++ b/tetra.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "simplecov", "~> 0.22.0"
   s.add_development_dependency "rake", "~> 13.2.0"
   s.add_development_dependency "rspec", "~> 3.13.0"
-  s.add_development_dependency "rubocop", "~> 1.64.1"
+  s.add_development_dependency "rubocop", "~> 1.66.0"
 
   s.add_runtime_dependency "clamp", "~> 1.3.2"
   s.add_runtime_dependency "erb", "~> 4.0.3"