diff --git a/app/main.py b/app/main.py
index 05e686e..ee9122f 100644
--- a/app/main.py
+++ b/app/main.py
@@ -797,10 +797,11 @@ async def loomio_fix_usernames(client: httpx.AsyncClient) -> dict:
         for ident in u.get("identities") or []:
             if ident.get("identity_type") == "oauth" and ident.get("uid"):
                 uid = ident["uid"].lower()
-                # Loomio usernames: lowercase letters, numbers, underscores only.
-                if uid.replace("_", "").isalnum() and len(uid) >= 2:
+                # Loomio usernames allow lowercase letters, numbers, underscores and hyphens.
+                if uid.replace("_", "").replace("-", "").isalnum() and len(uid) >= 2:
                     target = uid
                     break
+                # uid unusable (dots etc) — use email local-part instead
                 target = (u.get("email") or "").split("@")[0].lower() or None
                 break
         if not target and u.get("email") and "@" in u["email"]: