diff --git a/README.md b/README.md
index 9f75bac..8f99e12 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 <a href="http://braumeister.org/formula/buku"><img src="https://img.shields.io/homebrew/v/buku.svg?maxAge=600" alt="Homebrew" /></a>
 <a href="https://pypi.python.org/pypi/buku"><img src="https://img.shields.io/pypi/v/buku.svg?maxAge=600" alt="PyPI" /></a>
 <a href="https://packages.debian.org/search?keywords=buku&searchon=names&exact=1"><img src="https://img.shields.io/badge/debian-9+-blue.svg?maxAge=2592000" alt="Debian Strech+" /></a>
-<a href="http://packages.ubuntu.com/search?keywords=buku&searchon=names&exact=1"><img src="https://img.shields.io/badge/ubuntu-17.04+-blue.svg?maxAge=2592000" alt="Ubuntu Zesty+" /></a>
+<a href="https://packages.ubuntu.com/search?keywords=buku&searchon=names&exact=1"><img src="https://img.shields.io/badge/ubuntu-17.04+-blue.svg?maxAge=2592000" alt="Ubuntu Zesty+" /></a>
 <a href="https://launchpad.net/~twodopeshaggy/+archive/ubuntu/jarun/"><img src="https://img.shields.io/badge/ubuntu-PPA-blue.svg?maxAge=2592000" alt="Ubuntu PPA" /></a>
 </p>