diff --git a/dev_tools/prepared_env.py b/dev_tools/prepared_env.py
index 842ed675a..aba480716 100644
--- a/dev_tools/prepared_env.py
+++ b/dev_tools/prepared_env.py
@@ -97,14 +97,12 @@ def report_status_to_github(
         if target_url is not None:
             payload['target_url'] = target_url
 
-        url = "https://api.github.com/repos/{}/{}/statuses/{}?access_token={}".format(
-            self.repository.organization,
-            self.repository.name,
-            self.actual_commit_id,
-            self.repository.access_token,
+        url = "https://api.github.com/repos/{}/{}/statuses/{}".format(
+            self.repository.organization, self.repository.name, self.actual_commit_id
         )
+        headers = {'Authorization': 'token {}'.format(self.repository.access_token)}
 
-        response = requests.post(url, json=payload)
+        response = requests.post(url, json=payload, headers=headers)
 
         if response.status_code != 201:
             raise IOError(
diff --git a/dev_tools/prepared_env_security_test.py b/dev_tools/prepared_env_security_test.py
new file mode 100644
index 000000000..9ba02654b
--- /dev/null
+++ b/dev_tools/prepared_env_security_test.py
@@ -0,0 +1,38 @@
+import unittest
+from unittest.mock import patch, MagicMock
+from dev_tools.prepared_env import PreparedEnv
+from dev_tools.github_repository import GithubRepository
+
+
+class TestPreparedEnvSecurity(unittest.TestCase):
+    @patch('requests.post')
+    def test_report_status_to_github_token_in_header(self, mock_post):
+        # Setup
+        mock_response = MagicMock()
+        mock_response.status_code = 201
+        mock_post.return_value = mock_response
+
+        repo = GithubRepository('my-org', 'my-repo', 'my-token')
+        env = PreparedEnv(repo, 'my-commit', 'compare-commit', None, None)
+
+        # Execute
+        env.report_status_to_github('success', 'desc', 'ctx')
+
+        # Verify
+        args, kwargs = mock_post.call_args
+        url = args[0]
+        headers = kwargs.get('headers', {})
+
+        # Security check: Token should NOT be in the URL
+        self.assertNotIn('access_token=my-token', url, "Token should not be passed in the URL")
+
+        # Security check: Token should be in the Authorization header
+        self.assertEqual(
+            headers.get('Authorization'),
+            'token my-token',
+            "Token should be passed in the Authorization header",
+        )
+
+
+if __name__ == '__main__':
+    unittest.main()