diff --git a/api/Dockerfile b/api/Dockerfile
index fadb5616..297684fd 100644
--- a/api/Dockerfile
+++ b/api/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:bullseye
+FROM debian:bookworm
 ENV PYTHONUNBUFFERED 1
 ENV PYTHONPATH /app/
 ENV DEBIAN_FRONTEND noninteractive
diff --git a/api/build_runner.sh b/api/build_runner.sh
index 837cad43..55686ec9 100755
--- a/api/build_runner.sh
+++ b/api/build_runner.sh
@@ -7,7 +7,7 @@
 set -eu
 export DEBIAN_FRONTEND=noninteractive
 
-echo 'deb http://deb.debian.org/debian bullseye-backports main' \
+echo 'deb http://deb.debian.org/debian bookworm-backports main' \
   > /etc/apt/sources.list.d/backports.list
 
 # Install ca-certificates and gnupg first
diff --git a/api/debian/changelog b/api/debian/changelog
index 20c192e8..8b4601dd 100644
--- a/api/debian/changelog
+++ b/api/debian/changelog
@@ -1,3 +1,9 @@
+ooni-api (1.0.72.1) unstable; urgency=medium
+
+  * Build on bullseye
+
+ -- Federico Ceratto <federico@debian.org>  Thu, 28 Sep 2023 11:31:24 +0200
+
 ooni-api (1.0.72) unstable; urgency=medium
 
   * Fix probe registration iat