diff --git a/debian/compat b/debian/compat
deleted file mode 100644
index ec635144f60048986bc560c5576355344005e6e7..0000000000000000000000000000000000000000
--- a/debian/compat
+++ /dev/null
@@ -1 +0,0 @@
-9
diff --git a/debian/control b/debian/control
index 910fb9f51472bbb35294f072f351fdbd5b211d0f..1290525469da228fc23c9fb6614075fb182c67f1 100644
--- a/debian/control
+++ b/debian/control
@@ -3,11 +3,11 @@ Section: java
 Priority: optional
 Maintainer: Debian GNUKhata Team <pkg-java-maintainers@lists.alioth.debian.org>
 Uploaders: Pirate Praveen <praveen@debian.org>
-Build-Depends: debhelper (>= 9.0.0), javahelper, ant, default-jdk, junit4,
+Build-Depends: debhelper-compat (= 13), javahelper, ant, default-jdk, junit4,
  libitext-java, libcommons-collections3-java, libjdom1-java,
  libjcip-annotations-java, libognl-java, librhino-java
 Standards-Version: 3.9.5
-Homepage: http://www.jopendocument.org/
+Homepage: https://www.jopendocument.org/
 Vcs-Git: git://anonscm.debian.org/pkg-java/libjopendocument-java.git
 Vcs-Browser: http://anonscm.debian.org/gitweb/?p=pkg-java/libjopendocument-java.git;a=summary
 
diff --git a/debian/copyright b/debian/copyright
index 87aaa0ce35707fc4cfe2ce37fc95124e1a65b8fc..8fe63f11553f1ded57f71c272ae4a43305ad25fd 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: libjopendocument-java
 Source: http://jopendocument.org
 
diff --git a/debian/watch b/debian/watch
index a8bdc78261fcae4eb160d2f45493edfa444af904..8b698adf5a9dc6c4cbcd4708a50919f13e786336 100644
--- a/debian/watch
+++ b/debian/watch
@@ -1,3 +1,3 @@
 version=3
 opts="uversionmangle=s/(\d)[_\.\-\+]?((RC|rc|pre|dev|beta|alpha|b|a)\d*)$/$1~$2/,dversionmangle=s/(debian|dfsg|ds|deb|gh|repack)\d*$//" \
-http://jopendocument.org/downloads.html .*jOpenDocument-(\d[\d\.]+)\.jar
+https://jopendocument.org/downloads.html .*jOpenDocument-(\d[\d\.]+)\.jar