diff --git a/debian/watch b/debian/watch
index 217d8c8..75781b5 100644
--- a/debian/watch
+++ b/debian/watch
@@ -1,4 +1,4 @@
 version=3
-http://ftp.gnu.org/pub/gnu/unrtf/ \
+https://ftp.gnu.org/pub/gnu/unrtf/ \
 (?:.*[/=]|)unrtf(?:[_\-]?|[_\-]v)(\d\S*)\.(?:tar\.xz|txz|tar\.bz2|tbz2|tar\.gz|tgz)(?:[^\.].*)?
 # Bart Martens <bartm@debian.org>  Sat, 02 Mar 2013 17:04:37 +0000