diff --git a/debian/watch b/debian/watch
index bca5f14..2b59a87 100644
--- a/debian/watch
+++ b/debian/watch
@@ -1,3 +1,3 @@
 version=3
 opts=dversionmangle=s/\+ds$//,uversionmangle=s/(rc|a|b|c)/~$1/ \
-http://pypi.debian.net/cached-property/cached-property-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))
+https://pypi.debian.net/cached-property/cached-property-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))