diff -Nru percol-0.2.1/debian/changelog percol-0.2.1/debian/changelog
--- percol-0.2.1/debian/changelog	2018-08-21 20:29:03.000000000 +0000
+++ percol-0.2.1/debian/changelog	2019-02-01 19:48:04.000000000 +0000
@@ -1,3 +1,15 @@
+percol (0.2.1-3) unstable; urgency=medium
+
+  [ Ondřej Nový ]
+  * d/copyright: Use https protocol in Format field
+
+  [ Antoine Beaupré ]
+  * add missing watch file
+  * switch to dh-compat 12
+  * bump standards
+
+ -- Antoine Beaupré <anarcat@debian.org>  Fri, 01 Feb 2019 14:48:04 -0500
+
 percol (0.2.1-2) unstable; urgency=medium
 
   [ Daniel Echeverry ]
diff -Nru percol-0.2.1/debian/compat percol-0.2.1/debian/compat
--- percol-0.2.1/debian/compat	2018-08-21 20:29:03.000000000 +0000
+++ percol-0.2.1/debian/compat	1970-01-01 00:00:00.000000000 +0000
@@ -1 +0,0 @@
-10
diff -Nru percol-0.2.1/debian/control percol-0.2.1/debian/control
--- percol-0.2.1/debian/control	2018-08-21 20:29:03.000000000 +0000
+++ percol-0.2.1/debian/control	2019-02-01 19:48:04.000000000 +0000
@@ -2,12 +2,12 @@
 Section: utils
 Priority: optional
 Maintainer: Antoine Beaupré <anarcat@debian.org>
-Build-Depends: debhelper (>= 10)
+Build-Depends: debhelper-compat (= 12)
              , python3
              , python3-setuptools
              , python3-six
              , dh-python
-Standards-Version: 4.2.0
+Standards-Version: 4.3.0
 Homepage: https://github.com/mooz/percol
 Vcs-Git: https://salsa.debian.org/debian/percol.git
 Vcs-Browser: https://salsa.debian.org/debian/percol
diff -Nru percol-0.2.1/debian/copyright percol-0.2.1/debian/copyright
--- percol-0.2.1/debian/copyright	2018-08-21 20:29:03.000000000 +0000
+++ percol-0.2.1/debian/copyright	2019-02-01 19:48:04.000000000 +0000
@@ -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/
 
 Files: *
 Copyright: 2011-2013, mooz
diff -Nru percol-0.2.1/debian/watch percol-0.2.1/debian/watch
--- percol-0.2.1/debian/watch	1970-01-01 00:00:00.000000000 +0000
+++ percol-0.2.1/debian/watch	2019-02-01 19:48:04.000000000 +0000
@@ -0,0 +1,4 @@
+# Compulsory line, this is a version 3 file
+version=3
+
+https://github.com/mooz/percol/tags .*/archive/v?((?:\d+\.?)*)\.tar\.gz