diff --git a/debian/changelog b/debian/changelog
index 72a7fa3..4e4f32f 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,11 @@
+irsim (9.7.104-2) UNRELEASED; urgency=medium
+
+ * Remove constraints unnecessary since buster (oldstable):
+ + Build-Depends: Replace dependency on transitional package
+ x11proto-core-dev with replacement x11proto-dev.
+
+ -- Debian Janitor <janitor@jelmer.uk> Tue, 21 Mar 2023 11:35:34 -0000
+
irsim (9.7.104-1) unstable; urgency=medium
* New upstream release
diff --git a/debian/control b/debian/control
index 99e191b..b8712c3 100644
--- a/debian/control
+++ b/debian/control
@@ -8,7 +8,7 @@ Build-Depends: debhelper-compat (= 12),
mesa-common-dev,
tcl-dev,
tk-dev,
- x11proto-core-dev
+ x11proto-dev
Standards-Version: 4.4.1
Homepage: http://opencircuitdesign.com/irsim/
Vcs-Browser: https://salsa.debian.org/electronics-team/irsim
