diff --git a/requirements-swh.txt b/requirements-swh.txt
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,4 +1,4 @@
-swh.storage >= 0.10.0
+swh.storage >= 0.11.3
 swh.model >= 0.4.0
 swh.scheduler >= 0.0.39
 swh.loader.core >= 0.5.9
diff --git a/swh/loader/svn/loader.py b/swh/loader/svn/loader.py
--- a/swh/loader/svn/loader.py
+++ b/swh/loader/svn/loader.py
@@ -673,10 +673,12 @@
         and return the last loaded svn revision number or -1
         otherwise.
         """
+        origin = self.storage.origin_get([svn_url])[0]
+        if not origin:
+            return -1
         last_loaded_svn_rev = -1
         try:
-            origin = self.storage.origin_get({"url": svn_url})
-            last_swh_rev = self.swh_latest_snapshot_revision(origin["url"])["revision"]
+            last_swh_rev = self.swh_latest_snapshot_revision(origin.url)["revision"]
             last_swh_rev_headers = dict(last_swh_rev["extra_headers"])
             last_loaded_svn_rev = int(last_swh_rev_headers[b"svn_revision"])
         except Exception: