diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 438dd93..79ba362 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['3.1.4', '3.3.0']
+        ruby-version: ['3.3.10', '3.4.1', '3.4.9']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.rubocop.yml b/.rubocop.yml
index 226e81a..0fc8b2e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,12 +1,15 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 3.1
+  TargetRubyVersion: 3.3
   NewCops: enable
   Exclude:
     - 'vendor/**/*'
     - '_ignore/**/*'
 
+Gemspec/DevelopmentDependencies:
+  EnforcedStyle: gemspec
+
 Gemspec/RequireMFA:
   Enabled: false
 
diff --git a/.ruby-version b/.ruby-version
index 15a2799..5f6fc5e 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.0
+3.3.10
diff --git a/encrypted_strings.gemspec b/encrypted_strings.gemspec
index 8cdb9b7..b1f37fb 100644
--- a/encrypted_strings.gemspec
+++ b/encrypted_strings.gemspec
@@ -16,6 +16,6 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency("maxitest")
   s.add_development_dependency("rake")
-  s.add_development_dependency "rubocop", '1.30.0'
+  s.add_development_dependency "rubocop", '1.59.0'
   s.add_development_dependency("shoulda-matchers")
 end
diff --git a/lib/encrypted_strings/extensions/string.rb b/lib/encrypted_strings/extensions/string.rb
index 43ea895..c76d5e5 100644
--- a/lib/encrypted_strings/extensions/string.rb
+++ b/lib/encrypted_strings/extensions/string.rb
@@ -41,8 +41,8 @@ def self.included(base) #:nodoc:
       # 
       #   password = 'shhhh'
       #   password.encrypt(:sha, :salt => 'secret') # => "3b22cbe4acde873c3efc82681096f3ae69aff828"
-      def encrypt(*args)
-        cipher = cipher_from_args(*args)
+      def encrypt(*)
+        cipher = cipher_from_args(*)
         encrypted_string = cipher.encrypt(self)
         encrypted_string.cipher = cipher
         
@@ -58,8 +58,8 @@ def encrypt(*args)
       #   password = 'shhhh'
       #   password.encrypt!(:symmetric, :password => 'secret')  # => "qSg8vOo6QfU=\n"
       #   password                                              # => "qSg8vOo6QfU=\n"
-      def encrypt!(*args)
-        encrypted_string = encrypt(*args)
+      def encrypt!(*)
+        encrypted_string = encrypt(*)
         self.cipher = encrypted_string.cipher
         
         replace(encrypted_string)
@@ -113,8 +113,8 @@ def decrypt(*args)
       #   password = "qSg8vOo6QfU=\n"
       #   password.decrypt!(:symmetric, :password => 'secret')  # => "shhhh"
       #   password                                              # => "shhhh"
-      def decrypt!(*args)
-        value = replace(decrypt(*args))
+      def decrypt!(*)
+        value = replace(decrypt(*))
         self.cipher = nil
         value
       end
@@ -201,6 +201,6 @@ def cipher_from_args(*args) #:nodoc:
   end
 end
 
-::String.class_eval do
+String.class_eval do
   include EncryptedStrings::Extensions::String
 end