diff -Nru kernsmooth-2.23-20/debian/changelog kernsmooth-2.23-20/debian/changelog
--- kernsmooth-2.23-20/debian/changelog	2021-05-08 21:39:09.000000000 +0000
+++ kernsmooth-2.23-20/debian/changelog	2021-11-09 01:38:50.000000000 +0000
@@ -1,3 +1,10 @@
+kernsmooth (2.23-20-1.2110.0) impish; urgency=medium
+
+  * Compilation for Ubuntu 21.10
+  * Remove dependency for R 4.0.0 for backports in Ubuntu
+
+ -- Michael Rutter <marutter@gmail.com>  Tue, 09 Nov 2021 01:38:50 +0000
+
 kernsmooth (2.23-20-1) unstable; urgency=medium
 
   * New upstream release (to experimental during freeze)
diff -Nru kernsmooth-2.23-20/debian/control kernsmooth-2.23-20/debian/control
--- kernsmooth-2.23-20/debian/control	2021-05-08 21:38:49.000000000 +0000
+++ kernsmooth-2.23-20/debian/control	2021-11-09 01:38:50.000000000 +0000
@@ -2,7 +2,7 @@
 Section: gnu-r
 Priority: optional
 Maintainer: Dirk Eddelbuettel <edd@debian.org>
-Build-Depends: debhelper-compat (= 11), r-base-dev (>= 4.0.4), dh-r, r-cran-mass
+Build-Depends: debhelper-compat (= 11), r-base-dev, dh-r, r-cran-mass
 Standards-Version: 4.5.1
 Vcs-Browser: https://salsa.debian.org/edd/r-cran-kernsmooth
 Vcs-Git: https://salsa.debian.org/edd/r-cran-kernsmooth.git