diff --git a/debian/changelog b/debian/changelog
index 174ec79..0138fdd 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+ctdconverter (2.1-4) UNRELEASED; urgency=medium
+
+  * Update standards version to 4.5.1, no changes needed.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Fri, 24 Sep 2021 06:57:55 -0000
+
 ctdconverter (2.1-3) unstable; urgency=medium
 
   * Team upload.
diff --git a/debian/control b/debian/control
index 52d6d25..2e4d052 100644
--- a/debian/control
+++ b/debian/control
@@ -13,7 +13,7 @@
                python3-ctdopts,
                help2man,
                2to3
-Standards-Version: 4.5.0
+Standards-Version: 4.5.1
 Vcs-Browser: https://salsa.debian.org/med-team/ctdconverter
 Vcs-Git: https://salsa.debian.org/med-team/ctdconverter.git
 Homepage: https://github.com/WorkflowConversion/CTDConverter