diff --git a/cmd/tokidoki/main.go b/cmd/tokidoki/main.go
index 67b50a4..0c3f4b1 100644
--- a/cmd/tokidoki/main.go
+++ b/cmd/tokidoki/main.go
@@ -70,6 +70,10 @@ func (u *tokidokiHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		opts := webdav.ServePrincipalOptions{
 			CurrentUserPrincipalPath: userPrincipalPath,
 			HomeSets:                 homeSets,
+			Capabilities: []webdav.Capability{
+				carddav.CapabilityAddressBook,
+				caldav.CapabilityCalendar,
+			},
 		}
 
 		webdav.ServePrincipal(w, r, &opts)