diff --git a/caldav/server.go b/caldav/server.go
index f98d06e..f713174 100644
--- a/caldav/server.go
+++ b/caldav/server.go
@@ -58,7 +58,7 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 
-		http.Redirect(w, r, principalPath, http.StatusMovedPermanently)
+		http.Redirect(w, r, principalPath, http.StatusPermanentRedirect)
 		return
 	}
 
diff --git a/carddav/server.go b/carddav/server.go
index 0e3be6c..81ae875 100644
--- a/carddav/server.go
+++ b/carddav/server.go
@@ -57,7 +57,7 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 
-		http.Redirect(w, r, principalPath, http.StatusMovedPermanently)
+		http.Redirect(w, r, principalPath, http.StatusPermanentRedirect)
 		return
 	}