diff --git a/crates/caldav/src/calendar/service.rs b/crates/caldav/src/calendar/service.rs
index 55312f7..889b7bb 100644
--- a/crates/caldav/src/calendar/service.rs
+++ b/crates/caldav/src/calendar/service.rs
@@ -51,7 +51,7 @@ impl<C: CalendarStore, S: SubscriptionStore> ResourceService for CalendarResourc
     type Principal = Principal;
     type PrincipalUri = CalDavPrincipalUri;
 
-    const DAV_HEADER: &str = "1, 3, access-control, calendar-access, calendar-proxy, webdav-push";
+    const DAV_HEADER: &str = "1, 3, access-control, calendar-access, webdav-push";
 
     async fn get_resource(
         &self,
diff --git a/crates/caldav/src/principal/mod.rs b/crates/caldav/src/principal/mod.rs
index 33486db..efbf8b6 100644
--- a/crates/caldav/src/principal/mod.rs
+++ b/crates/caldav/src/principal/mod.rs
@@ -41,11 +41,6 @@ impl Resource for PrincipalResource {
         Resourcetype(&[
             ResourcetypeInner(Some(rustical_dav::namespace::NS_DAV), "collection"),
             ResourcetypeInner(Some(rustical_dav::namespace::NS_DAV), "principal"),
-            // https://github.com/apple/ccs-calendarserver/blob/13c706b985fb728b9aab42dc0fef85aae21921c3/doc/Extensions/caldav-proxy.txt
-            // ResourcetypeInner(
-            //     Some(rustical_dav::namespace::NS_CALENDARSERVER),
-            //     "calendar-proxy-write",
-            // ),
         ])
     }
 
diff --git a/crates/caldav/src/principal/service.rs b/crates/caldav/src/principal/service.rs
index 0cc5596..e850649 100644
--- a/crates/caldav/src/principal/service.rs
+++ b/crates/caldav/src/principal/service.rs
@@ -46,7 +46,7 @@ impl<AP: AuthenticationProvider, S: SubscriptionStore, CS: CalendarStore> Resour
     type Principal = Principal;
     type PrincipalUri = CalDavPrincipalUri;
 
-    const DAV_HEADER: &str = "1, 3, access-control, calendar-access, calendar-proxy";
+    const DAV_HEADER: &str = "1, 3, access-control, calendar-access";
 
     async fn get_resource(
         &self,