diff --git a/debian/copyright b/debian/copyright
index d0d397f..87871b8 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,6 +1,6 @@
 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Source: https://pypi.python.org/pypi/certbot-dns-RFC 2136
-Upstream-Name: certbot-dns-RFC 2136
+Upstream-Name: certbot-dns-rfc2136
 
 Files: *
 Copyright: 2015, Electronic Frontier Foundation and others