diff --git a/debian-mirror-tools/config/debian/common/base-bullseye.lst b/debian-mirror-tools/config/debian/common/base-bullseye.lst
index c076a24b0..c86f61761 100644
--- a/debian-mirror-tools/config/debian/common/base-bullseye.lst
+++ b/debian-mirror-tools/config/debian/common/base-bullseye.lst
@@ -269,8 +269,8 @@ libelf1  0.183-1
 libelf-dev  0.183-1
 libestr0  0.1.10-2.1+b1
 libevent-2.1-7  2.1.12-stable-1
-libexpat1  2.2.10-2+deb11u3
-libexpat1-dev  2.2.10-2+deb11u3
+libexpat1  2.2.10-2+deb11u4  https://snapshot.debian.org/archive/debian/20220930T210437Z/pool/main/e/expat/libexpat1_2.2.10-2%2Bdeb11u4_amd64.deb
+libexpat1-dev  2.2.10-2+deb11u4  https://snapshot.debian.org/archive/debian/20220930T210437Z/pool/main/e/expat/libexpat1-dev_2.2.10-2%2Bdeb11u4_amd64.deb
 libext2fs2  1.46.2-2
 libfam0  2.7.0-17.3
 libfastjson4  0.99.9-1