diff --git a/src/utils/isMastodonLinkMaybe.js b/src/utils/isMastodonLinkMaybe.js
index 1e749e3d7..780585c40 100644
--- a/src/utils/isMastodonLinkMaybe.js
+++ b/src/utils/isMastodonLinkMaybe.js
@@ -3,7 +3,9 @@ export default function isMastodonLinkMaybe(url) {
     const { pathname, hash, hostname } = URL.parse(url);
     return (
       /^\/.*\/\d+$/i.test(pathname) ||
-      /^\/(@[^/]+|users\/[^/]+)\/(statuses|posts)\/\w+\/?$/i.test(pathname) || // GoToSocial, Takahe
+      /^\/(@[^/]+|users\/[^/]+)\/(statuses|posts)\/[\w-]+\/?$/i.test(
+        pathname,
+      ) || // GoToSocial, Takahe, Castopod
       /^\/notes\/[a-z0-9]+$/i.test(pathname) || // Misskey, Firefish
       /^\/(notice|objects)\/[a-z0-9-]+$/i.test(pathname) || // Pleroma
       /^\/@[^/]+\/post\/[a-z0-9\-_]+$/i.test(pathname) || // Threads