diff --git a/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-caibx.transfer b/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-caibx.transfer
index 0dd4955..64edd6a 100644
--- a/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-caibx.transfer
+++ b/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-caibx.transfer
@@ -18,3 +18,4 @@ Path=/system
 # https://github.com/systemd/systemd/issues/38605
 MatchPattern=kde-linux_@v.erofs.caibx
 ReadOnly=yes
+InstancesMax=4
diff --git a/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-erofs.transfer b/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-erofs.transfer
index 473acbf..672bc6d 100644
--- a/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-erofs.transfer
+++ b/mkosi.extra/usr/lib/sysupdate.d/50-root-x86-64-erofs.transfer
@@ -15,3 +15,4 @@ Type=regular-file
 Path=/system
 MatchPattern=kde-linux_@v.erofs
 ReadOnly=yes
+InstancesMax=4