diff --git a/contrib/deb/generate.sh b/contrib/deb/generate.sh
index 21840bc1..beee3d51 100644
--- a/contrib/deb/generate.sh
+++ b/contrib/deb/generate.sh
@@ -49,6 +49,7 @@ Section: contrib/net
 Priority: extra
 Architecture: $PKGARCH
 Replaces: $PKGREPLACES
+Conflicts: $PKGREPLACES
 Maintainer: Neil Alexander <neilalexander@users.noreply.github.com>
 Description: Debian yggdrasil package
  Binary yggdrasil package for Debian and Ubuntu