diff --git a/Dockerfile b/Dockerfile
index 045b344..8e6e392 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@ RUN chmod +x /app/entrypoint.sh
 RUN echo "# Default deny all" > /etc/squid-deb-proxy/mirror-dstdomain.acl
 
 # At least one package must be blacklisted or autogeneration will fail
-RUN echo "non-existent-package" > /etc/squid-deb-proxy/pkg-blacklist
+RUN echo "non-existent-package" > /etc/squid-deb-proxy/pkg-blacklist.d/20-non-existent-package
 
 # Set all files in /app/allowlists as allowed domains
 RUN mkdir -p /app/allowlists && \
@@ -33,4 +33,4 @@ RUN touch /var/log/squid-deb-proxy/access.log && \
 
 EXPOSE 8000/tcp
 
-ENTRYPOINT ["/app/entrypoint.sh"]
\ No newline at end of file
+ENTRYPOINT ["/app/entrypoint.sh"]