diff --git a/uploader.py b/uploader.py
index d28854f..168355b 100644
--- a/uploader.py
+++ b/uploader.py
@@ -147,8 +147,8 @@ class CalibreClient:
                 except requests.HTTPError:
                     if resp.status_code in (502, 503, 504):
                         if attempt < 3:
-                            log.warning("HTTP %s on attempt %d/3 — retrying in 60s ...", resp.status_code, attempt)
-                            time.sleep(60)
+                            log.warning("HTTP %s on attempt %d/3 — retrying in 180s ...", resp.status_code, attempt)
+                            time.sleep(180)
                             continue
                         # All retries exhausted
                         self._consecutive_failures += 1