diff --git a/backport-trixie.sh b/backport-trixie.sh
index ee14d5a..370f437 100755
--- a/backport-trixie.sh
+++ b/backport-trixie.sh
@@ -65,7 +65,7 @@ run_in_podman() {
         -v /opt:/opt:shared \
         -v "$(pwd):/workspace:Z" \
         -w /workspace \
-        debian:12 \
+        debian:testing \
         bash -c "
             echo '=== Setting up container environment ==='
             apt update -y