diff --git a/snapshotter/src/snapshot.py b/snapshotter/src/snapshot.py
index 77de810..2a92214 100644
--- a/snapshotter/src/snapshot.py
+++ b/snapshotter/src/snapshot.py
@@ -29,6 +29,8 @@ def today(today=dt.today()):
 
 def download(url, target, **kwargs):
 	response = requests.get(url, stream=True, **kwargs)
+	if not response.ok:
+		raise ValueError("HTTP not OK", response.status_code, response.text)
 	response.raw.decode_content = True
 	with open(target, "wb") as out:
 		shutil.copyfileobj(response.raw, out)