1 files changed, 3 insertions, 1 deletions

diff --git a/server/helpers/custom-validators/activitypub/actor.ts b/server/helpers/custom-validators/activitypub/actor.ts
index 77c003cdf..070632a20 100644
--- a/server/helpers/custom-validators/activitypub/actor.ts
+++ b/server/helpers/custom-validators/activitypub/actor.ts
@@ -27,7 +27,8 @@ function isActorPublicKeyValid (publicKey: string) {
     validator.isLength(publicKey, CONSTRAINTS_FIELDS.ACTORS.PUBLIC_KEY)
 }
 
-const actorNameRegExp = new RegExp('^[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\\-_\.]+$')
+const actorNameAlphabet = '[ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789\\-_.]'
+const actorNameRegExp = new RegExp(`^${actorNameAlphabet}+$`)
 function isActorPreferredUsernameValid (preferredUsername: string) {
   return exists(preferredUsername) && validator.matches(preferredUsername, actorNameRegExp)
 }
@@ -127,6 +128,7 @@ function areValidActorHandles (handles: string[]) {
 
 export {
   normalizeActor,
+  actorNameAlphabet,
   areValidActorHandles,
   isActorEndpointsObjectValid,
   isActorPublicKeyObjectValid,