diff --git a/debian/changelog b/debian/changelog
index d9926cf..3a00eb8 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+postgresql-unit (7.5-3) UNRELEASED; urgency=medium
+
+  * Remove constraints unnecessary since buster (oldstable):
+    + Build-Depends: Drop versioned constraint on bison.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Mon, 24 Oct 2022 16:32:10 -0000
+
 postgresql-unit (7.5-2) unstable; urgency=medium
 
   * Upload for PostgreSQL 15.
diff --git a/debian/control b/debian/control
index c0a3dbe..95f4392 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@ Section: database
 Priority: optional
 Maintainer: Christoph Berg <myon@debian.org>
 Build-Depends:
- bison (>> 2:3),
+ bison,
  debhelper-compat (= 13),
  flex,
  postgresql-server-dev-all (>= 217~),