diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d40f3e3..88b6f0c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.18.0 - 2024-10-09]
+
+### Added
+
+- New `webhooks.unregister_all` method.
+
 ## [0.17.1 - 2024-09-06]
 
 ### Added
diff --git a/nc_py_api/_version.py b/nc_py_api/_version.py
index 749f78f5..abaed9bd 100644
--- a/nc_py_api/_version.py
+++ b/nc_py_api/_version.py
@@ -1,3 +1,3 @@
 """Version of nc_py_api."""
 
-__version__ = "0.17.1"
+__version__ = "0.18.0.dev0"
diff --git a/nc_py_api/webhooks.py b/nc_py_api/webhooks.py
index dd124e32..16bbf1c3 100644
--- a/nc_py_api/webhooks.py
+++ b/nc_py_api/webhooks.py
@@ -3,7 +3,7 @@
 import dataclasses
 
 from ._misc import clear_from_params_empty  # , require_capabilities
-from ._session import AsyncNcSessionBasic, NcSessionBasic
+from ._session import AppConfig, AsyncNcSessionBasic, NcSessionBasic
 
 
 @dataclasses.dataclass
@@ -140,6 +140,13 @@ def update(
     def unregister(self, webhook_id: int) -> bool:
         return self._session.ocs("DELETE", f"{self._ep_base}/{webhook_id}")
 
+    def unregister_all(self, appid: str = "") -> int:
+        if not appid and isinstance(self._session.cfg, AppConfig):
+            appid = self._session.cfg.app_name
+        else:
+            raise ValueError("The `appid` parameter cannot be empty for non-ExApp use.")
+        return self._session.ocs("DELETE", f"{self._ep_base}/byappid/{appid}")
+
 
 class _AsyncWebhooksAPI:
     """The class provides the async application management API on the Nextcloud server."""
@@ -208,3 +215,10 @@ async def update(
 
     async def unregister(self, webhook_id: int) -> bool:
         return await self._session.ocs("DELETE", f"{self._ep_base}/{webhook_id}")
+
+    async def unregister_all(self, appid: str = "") -> int:
+        if not appid and isinstance(self._session.cfg, AppConfig):
+            appid = self._session.cfg.app_name
+        else:
+            raise ValueError("The `appid` parameter cannot be empty for non-ExApp use.")
+        return await self._session.ocs("DELETE", f"{self._ep_base}/byappid/{appid}")