diff --git a/src/gitea_runner_manager/api_clients.py b/src/gitea_runner_manager/api_clients.py
index 571dfc8..0cb692b 100644
--- a/src/gitea_runner_manager/api_clients.py
+++ b/src/gitea_runner_manager/api_clients.py
@@ -163,7 +163,7 @@ class VikunjaClient:
         return r.json()
 
     def post_comment(self, task_id: int, comment: str) -> None:
-        self._request("POST", f"/tasks/{task_id}/comments", json={"comment": comment})
+        self._request("PUT", f"/tasks/{task_id}/comments", json={"comment": comment})
 
     def update_task(self, task_id: int, **fields: Any) -> None:
         self._request("POST", f"/tasks/{task_id}", json=fields)
diff --git a/tests/unit/test_api_clients.py b/tests/unit/test_api_clients.py
index 9304e6e..e701fe1 100644
--- a/tests/unit/test_api_clients.py
+++ b/tests/unit/test_api_clients.py
@@ -268,7 +268,7 @@ class TestVikunjaClient:
 
         client.post_comment(42, "<p>hi</p>")
         client._session.request.assert_called_once_with(
-            "POST",
+            "PUT",
             "https://work.example.com/tasks/42/comments",
             timeout=DEFAULT_TIMEOUT,
             json={"comment": "<p>hi</p>"},