diff --git a/debian/changelog b/debian/changelog
index 4dd21fb..11b4265 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,8 +1,20 @@
udunits (2.2.28-4) UNRELEASED; urgency=medium
+ [ Alastair McKinstry ]
* Don't ship broken redundant symlinks in doc dirs. Closes: #986457
* Standards-Version: 4.6.0
+ [ Debian Janitor ]
+ * Remove constraints unnecessary since buster (oldstable):
+ + libudunits2-0: Drop versioned constraint on dpkg and install-info in
+ Depends.
+ + libudunits2-data: Drop versioned constraint on libudunits2-0 in Replaces.
+ + libudunits2-data: Drop versioned constraint on libudunits2-0 in Breaks.
+ + udunits-bin: Drop versioned constraint on dpkg and install-info in
+ Depends.
+ + udunits-bin: Drop versioned constraint on libudunits2-0 in Replaces.
+ + udunits-bin: Drop versioned constraint on libudunits2-0 in Breaks.
+
-- Alastair McKinstry <mckinstry@debian.org> Sat, 10 Apr 2021 10:47:28 +0100
udunits (2.2.28-3) unstable; urgency=medium
diff --git a/debian/control b/debian/control
index 8a9db45..f3ab9ba 100644
--- a/debian/control
+++ b/debian/control
@@ -16,7 +16,7 @@ Vcs-Git: https://salsa.debian.org:/science-team/udunits.git -b debian/latest
Package: libudunits2-0
Section: libs
Architecture: any
-Depends: libudunits2-data, ${misc:Depends}, ${shlibs:Depends}, dpkg (>= 1.15.4) | install-info
+Depends: libudunits2-data, ${misc:Depends}, ${shlibs:Depends}
Description: Library for handling of units of physical quantities
The UDUNITS package supports units of physical quantities (e.g., meters,
seconds). Specifically, it supports conversion between string and binary
@@ -28,8 +28,6 @@ Package: libudunits2-data
Architecture: all
Multi-Arch: foreign
Depends: ${misc:Depends}
-Breaks: libudunits2-0 (<= 2.2.25-1)
-Replaces: libudunits2-0 (<= 2.2.25-1)
Description: Data for handling of units of physical quantities
The UDUNITS package supports units of physical quantities (e.g., meters,
seconds). Specifically, it supports conversion between string and binary
@@ -57,9 +55,7 @@ Package: udunits-bin
Section: utils
Architecture: any
Multi-Arch: foreign
-Breaks: libudunits2-0 (<= 2.2.26-2)
-Replaces: libudunits2-0 (<= 2.2.26-2)
-Depends: ${misc:Depends}, ${shlibs:Depends}, dpkg (>= 1.15.4) | install-info
+Depends: ${misc:Depends}, ${shlibs:Depends}
Description: Utility for handling units of physical quantities
udunits is a utility for handling units of physical quantities. It supports
conversion between string and binary representations of units,
