diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 77360f32..f73bbe56 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,8 +12,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, windows-2019]
-        ruby: ['3.0', '3.1', '3.2', '3.3']
+        os: [ubuntu-latest, windows-latest]
+        ruby: ['3.2', '3.3', '3.4', '4.0']
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
diff --git a/.rubocop.yml b/.rubocop.yml
index fa5031a7..ff6e3c09 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,6 @@
 AllCops:
-  TargetRubyVersion: 3.0
+  TargetRubyVersion: 3.2
+  NewCops: disable
 
   Exclude:
     - 'appveyor.yml'
diff --git a/README.md b/README.md
index 52b2e1f7..b782453e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ site](http://msdn.microsoft.com/en-us/library/aa384426.aspx).
 As of version 2.0, this gem retains the WinRM name but all powershell calls use the more modern [Powershell Remoting Protocol (PSRP)](https://msdn.microsoft.com/en-us/library/dd357801.aspx) for initializing runspace pools as well as creating and processing powershell pipelines.
 
 ## Supported Ruby Versions
-Ruby 3.0 or higher is required. If you need to use an older version of Ruby you'll need to use a previous version of this gem.
+Ruby 3.2 or higher is required. If you need to use an older version of Ruby you'll need to use a previous version of this gem.
 
 ## Supported WinRM Versions
 WinRM 1.1 is supported, however 2.0 and higher is recommended. [See MSDN](http://technet.microsoft.com/en-us/library/ff520073.aspx) for information about WinRM versions and supported operating systems.
diff --git a/appveyor.yml b/appveyor.yml
index f566457e..b9afb6d7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
 version: "master-{build}"
 
-image: Visual Studio 2019
+image: Visual Studio 2022
 platform:
   - x64
 
@@ -11,9 +11,9 @@ environment:
   user_key: c:\projects\winrm\key.pem
 
   matrix:
-    - ruby_version: "31"
+    - ruby_version: "33-x64"
       winrm_endpoint: http://localhost:5985/wsman
-    - ruby_version: "30"
+    - ruby_version: "32-x64"
       winrm_endpoint: http://localhost:5985/wsman
 
 clone_folder: c:\projects\winrm
diff --git a/winrm.gemspec b/winrm.gemspec
index fed474ea..7069373c 100644
--- a/winrm.gemspec
+++ b/winrm.gemspec
@@ -29,7 +29,8 @@ Gem::Specification.new do |s|
 
   s.bindir = 'bin'
   s.executables = ['rwinrm']
-  s.required_ruby_version = '>= 3.0'
+  s.required_ruby_version = '>= 3.2'
+  s.add_runtime_dependency 'base64', '~> 0.2'
   s.add_runtime_dependency 'builder', '>= 2.1.2'
   s.add_runtime_dependency 'erubi', '~> 1.8'
   s.add_runtime_dependency 'gssapi', '~> 1.2'
@@ -39,10 +40,10 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'nori', '~> 2.0', '>= 2.7.1'
   s.add_runtime_dependency 'rexml', '~> 3.0'
   s.add_development_dependency 'pry'
-  s.add_development_dependency 'rake', '>= 10.3', '< 13'
+  s.add_development_dependency 'rake', '~> 13.0'
   s.add_development_dependency 'rb-readline'
   s.add_development_dependency 'rspec', '~> 3.2'
-  s.add_development_dependency 'rubocop', '~> 1.26.0'
+  s.add_development_dependency 'rubocop', '~> 1.87'
   s.add_runtime_dependency 'rubyntlm', '~> 0.6.0', '>= 0.6.3'
 
   s.metadata['rubygems_mfa_required'] = 'true'