diff --git a/routes/signalid.py b/routes/signalid.py
index e5f1f5e..d63670b 100644
--- a/routes/signalid.py
+++ b/routes/signalid.py
@@ -414,7 +414,7 @@ def signalid_match() -> Response:
         )
     except Exception as exc:
         logger.error('Signal match failed: %s', exc)
-        return api_error('Signal match failed', 502)
+        return api_error('Signal match failed', 503)
 
     response_data = {
         'matches': matches,