diff --git a/lib/fastlane/plugin/ddg_apple_automation/actions/asana_extract_task_assignee_action.rb b/lib/fastlane/plugin/ddg_apple_automation/actions/asana_extract_task_assignee_action.rb
index ce6f3bc..2555370 100644
--- a/lib/fastlane/plugin/ddg_apple_automation/actions/asana_extract_task_assignee_action.rb
+++ b/lib/fastlane/plugin/ddg_apple_automation/actions/asana_extract_task_assignee_action.rb
@@ -1,7 +1,6 @@
 require "fastlane/action"
 require "fastlane_core/configuration/config_item"
 require "asana"
-require "json"
 require_relative "../helper/ddg_apple_automation_helper"
 require_relative "../helper/github_actions_helper"
 
diff --git a/lib/fastlane/plugin/ddg_apple_automation/actions/asana_find_release_task_action.rb b/lib/fastlane/plugin/ddg_apple_automation/actions/asana_find_release_task_action.rb
index 9aa0aaa..11b14e9 100644
--- a/lib/fastlane/plugin/ddg_apple_automation/actions/asana_find_release_task_action.rb
+++ b/lib/fastlane/plugin/ddg_apple_automation/actions/asana_find_release_task_action.rb
@@ -1,8 +1,6 @@
 require "fastlane/action"
 require "fastlane_core/configuration/config_item"
 require "asana"
-require "httparty"
-require "json"
 require "octokit"
 require "time"
 require_relative "../helper/ddg_apple_automation_helper"
diff --git a/lib/fastlane/plugin/ddg_apple_automation/actions/asana_upload_action.rb b/lib/fastlane/plugin/ddg_apple_automation/actions/asana_upload_action.rb
index ca181a5..ff68d49 100644
--- a/lib/fastlane/plugin/ddg_apple_automation/actions/asana_upload_action.rb
+++ b/lib/fastlane/plugin/ddg_apple_automation/actions/asana_upload_action.rb
@@ -1,6 +1,6 @@
 require "fastlane/action"
 require "fastlane_core/configuration/config_item"
-require "httparty"
+require "asana"
 require_relative "../helper/ddg_apple_automation_helper"
 
 module Fastlane
@@ -11,18 +11,15 @@ def self.run(params)
         token = params[:asana_access_token]
         file_name = params[:file_name]
 
-        begin
-          file = File.open(file_name)
-          url = Helper::DdgAppleAutomationHelper::ASANA_API_URL + "/tasks/#{task_id}/attachments"
-          response = HTTParty.post(url,
-                                   headers: { 'Authorization' => "Bearer #{token}" },
-                                   body: { file: file })
+        asana_client = Asana::Client.new do |c|
+          c.authentication(:access_token, token)
+        end
 
-          unless response.success?
-            UI.user_error!("Failed to upload file to Asana task: (#{response.code} #{response.message})")
-          end
-        rescue StandardError
-          UI.user_error!("Failed to open file: #{file_name}")
+        begin
+          asana_client.tasks.find_by_id(task_id).attach(filename: file_name, mime: "application/octet-stream")
+        rescue StandardError => e
+          UI.user_error!("Failed to upload file to Asana task: #{e}")
+          return
         end
       end
 
@@ -51,7 +48,7 @@ def self.available_options
                                        optional: false,
                                        type: String),
           FastlaneCore::ConfigItem.new(key: :file_name,
-                                       description: "Path to the file that will be uploaded",
+                                       description: "Path to a file that will be uploaded",
                                        optional: false,
                                        type: String)
         ]
diff --git a/spec/asana_upload_spec.rb b/spec/asana_upload_spec.rb
index 339112a..1204af8 100644
--- a/spec/asana_upload_spec.rb
+++ b/spec/asana_upload_spec.rb
@@ -1,30 +1,25 @@
 describe Fastlane::Actions::AsanaUploadAction do
   describe "#run" do
+    before do
+      @task = double("task")
+      @asana_client_tasks = double("asana_client_tasks")
+      asana_client = double("asana_client")
+      allow(Asana::Client).to receive(:new).and_return(asana_client)
+      allow(asana_client).to receive(:tasks).and_return(@asana_client_tasks)
+    end
     it "uploads a file successfully" do
-      allow(HTTParty).to receive(:post).and_return(double(success?: true))
-      allow(File).to receive(:open).with("path/to/file.txt").and_return(double)
+      allow(@asana_client_tasks).to receive(:find_by_id).with("123").and_return(@task)
+      allow(@task).to receive(:attach).with(filename: "path/to/file.txt", mime: "application/octet-stream")
 
-      expect { test_action("12345", "path/to/file.txt") }.not_to raise_error
+      expect { test_action("123", "path/to/file.txt") }.not_to raise_error
     end
 
-    it "shows error if HTTP failure" do
-      allow(HTTParty).to receive(:post).and_return(
-        double(
-          success?: false,
-          code: 500,
-          message: "Internal Server Error"
-        )
-      )
-      allow(File).to receive(:open).with("path/to/file.txt").and_return(double)
-
-      expect(Fastlane::UI).to receive(:user_error!).with("Failed to upload file to Asana task: (500 Internal Server Error)")
-      test_action("12345", "path/to/file.txt")
-    end
+    it "shows error if failure" do
+      allow(@asana_client_tasks).to receive(:find_by_id).with("123").and_return(@task)
+      allow(@task).to receive(:attach).and_raise(StandardError.new("API Error"))
 
-    it "shows error if file does not exist" do
-      expect(Fastlane::UI).to receive(:user_error!).with("Failed to open file: path/to/file.txt")
-      expect(HTTParty).not_to receive(:post)
-      test_action("12345", "path/to/file.txt")
+      expect(Fastlane::UI).to receive(:user_error!).with("Failed to upload file to Asana task: API Error")
+      test_action("123", "path/to/file.txt")
     end
   end