diff --git a/start.sh b/start.sh
index 692bbc7..2e7fecc 100755
--- a/start.sh
+++ b/start.sh
@@ -79,6 +79,8 @@ else
     update_config
 
     [[ -n "${CLOUDRON_LDAP_SERVER:-}" ]] && update_ldap
+
+    (sleep 30; echo "==> Generating avatar miniatures"; gosu cloudron:cloudron node dist/scripts/migrations/peertube-4.2.js) &
 fi
 
 chown -R cloudron:cloudron /app/data /run/peertube