diff --git a/sok/management/commands/dblptex.py b/sok/management/commands/dblptex.py
index ed7c7b8..85890b8 100644
--- a/sok/management/commands/dblptex.py
+++ b/sok/management/commands/dblptex.py
@@ -1,6 +1,6 @@
 import requests
 
-from django.core.management.base import BaseCommand, CommandParser
+from django.core.management.base import BaseCommand, CommandError, CommandParser
 
 import sok.management.commands.dblpimport as dblp
 
@@ -17,4 +17,10 @@ class Command(BaseCommand):
 		url = f'https://dblp.uni-trier.de/rec/{key}.bib?param=0'
 		response = requests.get(url)
 		response.raise_for_status
+
+		# The status does not necessarily indicate success, but returns an error
+		# page instead.
+		if 'application/x-bibtex' not in response.headers['Content-Type']:
+			raise CommandError(url)
+
 		self.stdout.write(response.content.decode())