diff --git a/ext/shopify-extensions/shopify_extensions.rb b/ext/shopify-extensions/shopify_extensions.rb
index 0ba4383a0b..55f84105af 100644
--- a/ext/shopify-extensions/shopify_extensions.rb
+++ b/ext/shopify-extensions/shopify_extensions.rb
@@ -4,9 +4,7 @@
 require "zlib"
 require "rubygems"
 require "rubygems/package"
-
-require_relative "../../vendor/deps/cli-kit/lib/cli/kit"
-require_relative "../../vendor/deps/cli-ui/lib/cli/ui"
+require "open3"
 
 module ShopifyExtensions
   class InstallationError < RuntimeError
@@ -32,18 +30,17 @@ def self.call(platform: Platform.new, **args)
       new.call(platform: platform, **args)
     end
 
-    def call(platform:, version:, source:, target:)
-      source = platform.format_path(source)
+    def call(platform:, version:, target:)
       target = platform.format_path(target)
 
       releases
         .find { |release| release.version == version }
         .tap { |release| raise InstallationError.release_not_found unless release }
-        .download(platform: platform, source: source, target: target)
+        .download(platform: platform, target: target)
 
       raise InstallationError.not_executable unless File.executable?(target)
 
-      installed_server_version, _ = CLI::Kit::System.capture2(target, "version")
+      installed_server_version, _ = Open3.capture2(target, "version")
       raise InstallationError.incorrect_version unless installed_server_version.strip == version.strip
     end
 
@@ -72,11 +69,11 @@ def self.to_proc
       end
     end
 
-    def download(platform:, source:, target:)
+    def download(platform:, target:)
       assets
         .filter(&:binary?)
         .find { |asset| asset.os == platform.os && asset.cpu == platform.cpu }
-        .download(source: source, target: target)
+        .download(target: target)
     end
   end
 
@@ -90,17 +87,17 @@ def self.to_proc
       end
     end
 
-    def download(source:, target:)
+    def download(target:)
       Dir.chdir(File.dirname(target)) do
         File.open(File.basename(target), "w") do |target_file|
-          unpack(source, from: decompress(URI.parse(url).open), to: target_file)
+          decompress(URI.parse(url).open, target_file)
         end
         File.chmod(0755, target)
       end
     end
 
     def binary?
-      !!/(tar\.gz)|(zip)$/.match(name)
+      !!/\.gz$/.match(name)
     end
 
     def checksum?
@@ -115,33 +112,20 @@ def cpu
       name_without_extension.split("-")[-1]
     end
 
-    def version
-      name_without_extension.split("-")[-3]
-    end
-
     private
 
-    def decompress(archive)
-      decoder = Zlib::GzipReader.new(archive)
-      unzipped = StringIO.new(decoder.read)
-      decoder.close
-      unzipped
-    end
-
-    def unpack(name, from:, to:)
-      Gem::Package::TarReader.new(from) do |tar|
-        tar.each do |entry|
-          next unless File.basename(entry.full_name) == name
-          to.write(entry.read)
-        end
-      end
+    def decompress(source, target)
+      zlib = Zlib::GzipReader.new(source)
+      target << zlib.read
+    ensure
+      zlib.close
     end
 
     def name_without_extension
       if binary?
-        File.basename(name, ".tar.gz")
+        File.basename(File.basename(name, ".gz"), ".exe")
       elsif checksum?
-        File.basename(name, "_checksum.txt")
+        File.basename(File.basename(name, ".md5"), ".exe")
       else
         raise NotImplementedError, "Unknown file type"
       end
@@ -155,7 +139,7 @@ def initialize(ruby_config = RbConfig::CONFIG)
       def format_path(path)
         case os
         when "windows"
-          path + ".exe"
+          File.extname(path) != ".exe" ? path + ".exe" : path
         else
           path
         end
diff --git a/test/ext/shopify-extensions/shopify_extensions_test.rb b/test/ext/shopify-extensions/shopify_extensions_test.rb
index ef0a619a8e..3937089531 100644
--- a/test/ext/shopify-extensions/shopify_extensions_test.rb
+++ b/test/ext/shopify-extensions/shopify_extensions_test.rb
@@ -3,7 +3,7 @@
 
 module ShopifyExtensions
   class ShopfyExtensionsTest < Minitest::Test
-    def test_installation_of_existing_version
+    def test_installation_of_existing_version_for_mac_os
       stub_releases_request
       stub_executable_download
 
@@ -15,7 +15,6 @@ def test_installation_of_existing_version
           "host_cpu" => "x86_64",
         }),
         version: "v0.1.0",
-        source: "shopify-extensions",
         target: target
       )
 
@@ -24,6 +23,25 @@ def test_installation_of_existing_version
       assert_match(/v0.1.0/, %x(#{target}))
     end
 
+    def test_installation_of_existing_version_for_windows
+      stub_releases_request
+      stub_executable_download
+
+      target = File.join(dir = Dir.mktmpdir, "shopify-extensions.exe")
+
+      Install.call(
+        platform: Platform.new({
+          "host_os" => "mingw32",
+          "host_cpu" => "x64",
+        }),
+        version: "v0.1.0",
+        target: target
+      )
+
+      assert File.file?(target)
+      assert File.executable?(target)
+    end
+
     def test_installation_of_non_existing_version
       stub_releases_request
       stub_executable_download
@@ -37,7 +55,6 @@ def test_installation_of_non_existing_version
             "host_cpu" => "x86_64",
           }),
           version: "v0.0.0",
-          source: "shopify-extensions",
           target: target
         )
       end
@@ -80,143 +97,231 @@ def ruby_config(os:, cpu:)
     end
 
     class AssetTest < MiniTest::Test
-      def test_initialization
+      def test_initialization_for_mac_os
         asset = Asset.new(
-          name: "shopify-extensions-v0.1.0-darwin-amd64.tar.gz",
-          url: "https://github.com/Shopify/shopify-cli-extensions/releases/download/v0.1.0/shopify-extensions-v0.1.0-darwin-amd64.tar.gz"
+          name: "shopify-extensions-v0.1.0-darwin-amd64.gz",
+          url: "https://github.com/Shopify/shopify-cli-extensions/releases/download/v0.1.0/shopify-extensions-darwin-amd64.gz"
         )
 
-        assert_equal "v0.1.0", asset.version
         assert_equal "darwin", asset.os
         assert_equal "amd64", asset.cpu
       end
+
+      def test_initialization_for_windows
+        asset = Asset.new(
+          name: "shopify-extensions-v0.1.0-windows-amd64.exe.gz",
+          url: "https://github.com/Shopify/shopify-cli-extensions/releases/download/v0.1.0/shopify-extensions-windows-amd64.exe.gz"
+        )
+
+        assert_equal "windows", asset.os
+        assert_equal "amd64", asset.cpu
+      end
     end
 
     def stub_releases_request
       stub_request(:get, "https://api.github.com/repos/Shopify/shopify-cli-extensions/releases")
         .to_return(status: 200, body: <<~JSON)
-          [
-            {
-              "url": "https://api.github.com/repos/Shopify/shopify-cli-extensions/releases/49152028",
-              "assets_url": "https://api.github.com/repos/Shopify/shopify-cli-extensions/releases/49152028/assets",
-              "upload_url": "https://uploads.github.com/repos/Shopify/shopify-cli-extensions/releases/49152028/assets{?name,label}",
-              "html_url": "https://github.com/Shopify/shopify-cli-extensions/releases/tag/v0.1.0",
-              "id": 49152028,
-              "author": {
-                "login": "t6d",
-                "id": 77060,
-                "node_id": "MDQ6VXNlcjc3MDYw",
-                "avatar_url": "https://avatars.githubusercontent.com/u/77060?v=4",
-                "gravatar_id": "",
-                "url": "https://api.github.com/users/t6d",
-                "html_url": "https://github.com/t6d",
-                "followers_url": "https://api.github.com/users/t6d/followers",
-                "following_url": "https://api.github.com/users/t6d/following{/other_user}",
-                "gists_url": "https://api.github.com/users/t6d/gists{/gist_id}",
-                "starred_url": "https://api.github.com/users/t6d/starred{/owner}{/repo}",
-                "subscriptions_url": "https://api.github.com/users/t6d/subscriptions",
-                "organizations_url": "https://api.github.com/users/t6d/orgs",
-                "repos_url": "https://api.github.com/users/t6d/repos",
-                "events_url": "https://api.github.com/users/t6d/events{/privacy}",
-                "received_events_url": "https://api.github.com/users/t6d/received_events",
-                "type": "User",
-                "site_admin": false
+        [
+          {
+            "url": "https://api.github.com/repos/Shopify/shopify-cli-extensions/releases/49531769",
+            "assets_url": "https://api.github.com/repos/Shopify/shopify-cli-extensions/releases/49531769/assets",
+            "upload_url": "https://uploads.github.com/repos/Shopify/shopify-cli-extensions/releases/49531769/assets{?name,label}",
+            "html_url": "https://github.com/Shopify/shopify-cli-extensions/releases/tag/v0.1.0",
+            "id": 49531769,
+            "author": {
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+                  "node_id": "MDM6Qm90NDE4OTgyODI=",
+                  "avatar_url": "https://avatars.githubusercontent.com/in/15368?v=4",
+                  "gravatar_id": "",
+                  "url": "https://api.github.com/users/github-actions%5Bbot%5D",
+                  "html_url": "https://github.com/apps/github-actions",
+                  "followers_url": "https://api.github.com/users/github-actions%5Bbot%5D/followers",
+                  "following_url": "https://api.github.com/users/github-actions%5Bbot%5D/following{/other_user}",
+                  "gists_url": "https://api.github.com/users/github-actions%5Bbot%5D/gists{/gist_id}",
+                  "starred_url": "https://api.github.com/users/github-actions%5Bbot%5D/starred{/owner}{/repo}",
+                  "subscriptions_url": "https://api.github.com/users/github-actions%5Bbot%5D/subscriptions",
+                  "organizations_url": "https://api.github.com/users/github-actions%5Bbot%5D/orgs",
+                  "repos_url": "https://api.github.com/users/github-actions%5Bbot%5D/repos",
+                  "events_url": "https://api.github.com/users/github-actions%5Bbot%5D/events{/privacy}",
+                  "received_events_url": "https://api.github.com/users/github-actions%5Bbot%5D/received_events",
+                  "type": "Bot",
+                  "site_admin": false
+                },
+                "content_type": "application/octet-stream",
+                "state": "uploaded",
+                "size": 57,
+                "download_count": 0,
+                "created_at": "2021-09-14T14:04:47Z",
+                "updated_at": "2021-09-14T14:04:47Z",
+                "browser_download_url": "https://github.com/Shopify/shopify-cli-extensions/releases/download/v0.1.0/shopify-extensions-windows-amd64.exe.md5"
+              }
+            ],
+            "tarball_url": "https://api.github.com/repos/Shopify/shopify-cli-extensions/tarball/v0.1.0",
+            "zipball_url": "https://api.github.com/repos/Shopify/shopify-cli-extensions/zipball/v0.1.0",
+            "body": "Initial release for integration testing purposes only."
+          }
+        ]
         JSON
     end
 
     def stub_executable_download
       dummy_archive = load_dummy_archive
 
-      stub_request(:get, "https://github.com/Shopify/shopify-cli-extensions/releases/download/v0.1.0/shopify-extensions-v0.1.0-darwin-amd64.tar.gz")
+      stub_request(:get, "https://github.com/Shopify/shopify-cli-extensions/releases/download/v0.1.0/shopify-extensions-windows-amd64.exe.gz")
+        .to_return(
+          status: 200,
+          headers: {
+            "Content-Type" => "application/octet-stream",
+            "Content-Disposition" => "attachment; filename=shopify-extensions-windows-amd64.exe.gz",
+            "Content-Length" => dummy_archive.size,
+          },
+          body: dummy_archive
+        )
+
+      stub_request(:get, "https://github.com/Shopify/shopify-cli-extensions/releases/download/v0.1.0/shopify-extensions-darwin-amd64.gz")
         .to_return(
           status: 200,
           headers: {
             "Content-Type" => "application/octet-stream",
-            "Content-Disposition" => "attachment; filename=shopify-extensions_0.1.0_darwin_amd64.tar.gz",
+            "Content-Disposition" => "attachment; filename=shopify-extensions-darwin-amd64.gz",
             "Content-Length" => dummy_archive.size,
           },
           body: dummy_archive
@@ -224,7 +329,7 @@ def stub_executable_download
     end
 
     def load_dummy_archive
-      path = File.expand_path("../../../fixtures/shopify-extensions.tar.gz", __FILE__)
+      path = File.expand_path("../../../fixtures/shopify-extensions.gz", __FILE__)
       raise "Dummy archive not found: #{path}" unless File.file?(path)
       File.read(path)
     end
diff --git a/test/fixtures/shopify-extensions.gz b/test/fixtures/shopify-extensions.gz
new file mode 100755
index 0000000000..b61cd670b9
Binary files /dev/null and b/test/fixtures/shopify-extensions.gz differ
diff --git a/test/fixtures/shopify-extensions.tar.gz b/test/fixtures/shopify-extensions.tar.gz
deleted file mode 100644
index ea0c00cc15..0000000000
Binary files a/test/fixtures/shopify-extensions.tar.gz and /dev/null differ