diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@
 # should match https://pypi.python.org/pypi names. For the full spec or
 # dependency lines, see https://pip.readthedocs.org/en/1.1/requirements.html
 
+sentry-sdk
\ No newline at end of file
diff --git a/swh/loader/cvs/loader.py b/swh/loader/cvs/loader.py
--- a/swh/loader/cvs/loader.py
+++ b/swh/loader/cvs/loader.py
@@ -15,6 +15,7 @@
 import time
 from typing import Any, BinaryIO, Dict, Iterator, List, Optional, Sequence, Tuple, cast
 
+import sentry_sdk
 from urllib3.util import parse_url
 
 from swh.loader.core.loader import BaseLoader
@@ -548,6 +549,7 @@
             return False
         except Exception:
             self.log.exception("Exception in fetch_data:")
+            sentry_sdk.capture_exception()
             self._visit_status = "failed"
             return False  # Stopping iteration
         self._contents, self._skipped_contents, self._directories, rev = data