diff --git a/lib/shared/invite-links.js b/lib/shared/invite-links.js
index 37b8b54f0..8c6c502b5 100644
--- a/lib/shared/invite-links.js
+++ b/lib/shared/invite-links.js
@@ -1,61 +1,61 @@
 // @flow
 
 import blobService from '../facts/blob-service.js';
 import { getBlobFetchableURL } from '../utils/blob-service.js';
 
 const inviteLinkErrorMessages: { +[string]: string } = {
   invalid_characters: 'Link cannot contain any spaces or special characters.',
   offensive_words: 'No offensive or abusive words allowed.',
   already_in_use: 'Public link URL already in use.',
   link_reserved:
     'This public link is currently reserved. Please contact support@' +
     'comm.app if you would like to claim this link.',
 };
 
 const defaultErrorMessage = 'Unknown error.';
 
 function inviteLinkBlobHash(secret: string): string {
   return `invite_${secret}`;
 }
 
 export type KeyserverOverride = {
   +keyserverID: string,
   +keyserverURL: string,
 };
 
 async function getKeyserverOverrideForAnInviteLink(
   secret: string,
 ): Promise<?KeyserverOverride> {
   const blobURL = getBlobFetchableURL(inviteLinkBlobHash(secret));
   const result = await fetch(blobURL, {
     method: blobService.httpEndpoints.GET_BLOB.method,
   });
   if (result.status !== 200) {
     return null;
   }
   const resultText = await result.text();
   const resultObject = JSON.parse(resultText);
   if (resultObject.keyserverID && resultObject.keyserverURL) {
     const keyserverURL: string = resultObject.keyserverURL;
     return {
       keyserverID: resultObject.keyserverID,
       keyserverURL: keyserverURL.replace(/\/$/, ''),
     };
   }
   return null;
 }
 
-const inviteSecretRegexString = '[a-zA-Z0-9]+';
+const inviteSecretRegexString = '[a-zA-Z0-9-]+';
 const inviteSecretRegex: RegExp = new RegExp(
   `^${inviteSecretRegexString}$`,
   'i',
 );
 
 export {
   inviteLinkErrorMessages,
   defaultErrorMessage,
   inviteLinkBlobHash,
   getKeyserverOverrideForAnInviteLink,
   inviteSecretRegexString,
   inviteSecretRegex,
 };