diff --git a/Gemfile b/Gemfile
index ac310c2..5f2ca4d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source "https://rubygems.org"
 # Specify your gem's dependencies in win32-certstore.gemspec
 gemspec
 
-gem "mixlib-shellout", "< 3.2.3"
+# gem "mixlib-shellout", "< 3.2.3"
 
 if Gem.ruby_version.to_s.start_with?("2.5")
   # 16.7.23 required ruby 2.6+
diff --git a/lib/win32/certstore/mixin/shell_exec.rb b/lib/win32/certstore/mixin/shell_exec.rb
deleted file mode 100644
index 8021924..0000000
--- a/lib/win32/certstore/mixin/shell_exec.rb
+++ /dev/null
@@ -1,105 +0,0 @@
-#
-# Author:: Daniel DeLeo (<dan@chef.io>)
-# Copyright:: Copyright (c) 2017 Chef Software, Inc.
-# License:: Apache License, Version 2.0
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-require "mixlib/shellout" unless defined?(Mixlib::ShellOut)
-
-module Win32
-  class Certstore
-    module Mixin
-      module ShellExec
-        def shell_out_command(*command_args)
-          cmd = Mixlib::ShellOut.new(*command_args)
-          cmd.live_stream
-          cmd.run_command
-          if cmd.error!
-            raise Mixlib::ShellOut::ShellCommandFailed, cmd.error!
-          end
-
-          cmd
-        end
-
-        # Run a command under powershell with the same API as shell_out.  The
-        # options hash is extended to take an "architecture" flag which
-        # can be set to :i386 or :x86_64 to force the windows architecture.
-        #
-        # @param script [String] script to run
-        # @param options [Hash] options hash
-        # @return [Mixlib::Shellout] mixlib-shellout object
-        def powershell_exec(*command_args)
-          script = command_args.first
-          options = command_args.last.is_a?(Hash) ? command_args.last : nil
-
-          run_command_with_os_architecture(script, options)
-        end
-
-        # Run a command under powershell with the same API as shell_out!
-        # (raises exceptions on errors)
-        #
-        # @param script [String] script to run
-        # @param options [Hash] options hash
-        # @return [Mixlib::Shellout] mixlib-shellout object
-        def powershell_exec!(*command_args)
-          cmd = powershell_exec(*command_args)
-          cmd.error!
-          cmd
-        end
-
-        private
-
-        # Helper function to run shell_out and wrap it with the correct
-        # flags to possibly disable WOW64 redirection (which we often need
-        # because chef-client runs as a 32-bit app on 64-bit windows).
-        #
-        # @param script [String] script to run
-        # @param options [Hash] options hash
-        # @return [Mixlib::Shellout] mixlib-shellout object
-        def run_command_with_os_architecture(script, options)
-          options ||= {}
-          options = options.dup
-
-          shell_out_command(
-            build_powershell_command(script),
-            options
-          )
-        end
-
-        # Helper to build a powershell command around the script to run.
-        #
-        # @param script [String] script to run
-        # @return [String] powershell command to execute
-        def build_powershell_command(script)
-          flags = [
-            # Hides the copyright banner at startup.
-            "-NoLogo",
-            # Does not present an interactive prompt to the user.
-            "-NonInteractive",
-            # Does not load the Windows PowerShell profile.
-            "-NoProfile",
-            # always set the ExecutionPolicy flag
-            # see http://technet.microsoft.com/en-us/library/ee176961.aspx
-            "-ExecutionPolicy Unrestricted",
-            # Powershell will hang if STDIN is redirected
-            # http://connect.microsoft.com/PowerShell/feedback/details/572313/powershell-exe-can-hang-if-stdin-is-redirected
-            "-InputFormat None",
-          ]
-
-          "powershell.exe #{flags.join(" ")} -Command \"#{script.gsub('"', '\"')}\""
-        end
-      end
-    end
-  end
-end
diff --git a/spec/win32/unit/store/shell_exec_spec.rb b/spec/win32/unit/store/shell_exec_spec.rb
deleted file mode 100644
index 28e3289..0000000
--- a/spec/win32/unit/store/shell_exec_spec.rb
+++ /dev/null
@@ -1,22 +0,0 @@
-require "spec_helper"
-require "win32/certstore/mixin/shell_exec"
-
-describe Win32::Certstore::Mixin::ShellExec do
-  let(:string_class) { Class.new { include Win32::Certstore::Mixin::ShellExec } }
-  subject(:string_obj) { string_class.new }
-
-  context "when testing individual methods" do
-    describe "#shell_out_Command" do
-      it "executes shellout command" do
-        cmd = "echo '#{rand(1000)}'"
-        expect(string_obj).to receive(:shell_out_Command).with(cmd).and_return(true)
-        string_obj.shell_out_Command(cmd)
-      end
-
-      it "raises Mixlib::ShellOut::ShellCommandFailed error if invalid command is passed" do
-        cmd = "powershell.exe -Command -in 'abc'"
-        expect { string_obj.shell_out_command(cmd) }.to raise_error(Mixlib::ShellOut::ShellCommandFailed)
-      end
-    end
-  end
-end
diff --git a/win32-certstore.gemspec b/win32-certstore.gemspec
index 3ac2eb8..d974022 100644
--- a/win32-certstore.gemspec
+++ b/win32-certstore.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rspec", "~> 3.0"
 
-  spec.add_dependency "mixlib-shellout"
+  # spec.add_dependency "mixlib-shellout"
   spec.add_dependency "ffi"
   spec.add_runtime_dependency "chef-powershell"
   spec.metadata["yard.run"] = "yri"