diff --git a/radicale/app/proppatch.py b/radicale/app/proppatch.py
index 53ab4822..70bd22e7 100644
--- a/radicale/app/proppatch.py
+++ b/radicale/app/proppatch.py
@@ -21,9 +21,12 @@ import socket
 from http import client
 from xml.etree import ElementTree as ET
 
+import defusedxml.ElementTree as DefusedET
+
 from radicale import app, httputils
 from radicale import item as radicale_item
 from radicale import storage, xmlutils
+from radicale.hook import HookNotificationItem, HookNotificationItemTypes
 from radicale.log import logger
 
 
@@ -112,6 +115,13 @@ class ApplicationProppatchMixin:
             try:
                 xml_answer = xml_proppatch(base_prefix, path, xml_content,
                                            item)
+                hook_notification_item = HookNotificationItem(
+                    HookNotificationItemTypes.CPATCH,
+                    access.path,
+                    DefusedET.tostring(xml_content, encoding=self._encoding)
+                        .decode(encoding=self._encoding)
+                )
+                self._hook.notify(hook_notification_item)
             except ValueError as e:
                 logger.warning(
                     "Bad PROPPATCH request on %r: %s", path, e, exc_info=True)
diff --git a/radicale/hook/__init__.py b/radicale/hook/__init__.py
index 0fc09b42..ed158489 100644
--- a/radicale/hook/__init__.py
+++ b/radicale/hook/__init__.py
@@ -29,6 +29,7 @@ class BaseHook:
 
 
 class HookNotificationItemTypes(Enum):
+    CPATCH = "cpatch"
     UPSERT = "upsert"
     DELETE = "delete"