diff --git a/scripts/sweep_stale_upstream.py b/scripts/sweep_stale_upstream.py
index 036745e..2f88184 100644
--- a/scripts/sweep_stale_upstream.py
+++ b/scripts/sweep_stale_upstream.py
@@ -88,13 +88,23 @@ def main() -> None:
             break
         checked += 1
 
-        pds = resolve_pds(client, did)
+        try:
+            pds = resolve_pds(client, did)
+        except httpx.HTTPError as e:
+            failed += 1
+            print(f"  probe-failed uid={uid} {did}: resolve error: {type(e).__name__}")
+            continue
         if not pds:
             failed += 1
             print(f"  probe-failed uid={uid} {did}: no PDS resolved")
             continue
 
-        actual = fetch_status(client, pds, did)
+        try:
+            actual = fetch_status(client, pds, did)
+        except httpx.HTTPError as e:
+            failed += 1
+            print(f"  probe-failed uid={uid} {did} @ {pds}: {type(e).__name__}")
+            continue
         if actual is None:
             failed += 1
             print(f"  probe-failed uid={uid} {did} @ {pds}")