diff --git a/.editorconfig b/.editorconfig
index 802817e..b4b89fc 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -10,7 +10,7 @@ trim_trailing_whitespace = true
 indent_style = space
 indent_size = 4
 
-[Makefile,Makefile.*]
+[Makefile,Makefile.*,rules]
 indent_style = tab
 indent_size = 8
 
diff --git a/debian/compat b/debian/compat
deleted file mode 100644
index ec63514..0000000
--- a/debian/compat
+++ /dev/null
@@ -1 +0,0 @@
-9
diff --git a/debian/control b/debian/control
index 4d8a67a..9362923 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@ Section: libdevel
 Priority: optional
 Maintainer: Adam Dickmeiss <adam@indexdata.dk>
 Standards-Version: 3.6.2
-Build-Depends: debhelper (>= 9.0.0),
+Build-Depends: debhelper-compat (= 13),
 	libxml2-dev, libxslt1-dev,
 	pkg-config,
 	libyaz5-dev (>= 5.35.0)