diff --git a/debian/copyright b/debian/copyright
index 2317360..8f6153b 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,4 +1,4 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: Solaris Porting Layer for Linux
 Upstream-Contact: Brian Behlendorf <behlendorf1@llnl.gov>
 Source: https://github.com/zfsonlinux/spl/