diff --git a/.zuul.yaml b/.zuul.yaml
index ad2293596..5a2c23938 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -61,8 +61,8 @@
     dependencies:
       - opendev-buildset-registry
     requires:
-      - python-builder-3.11-bullseye-container-image
-      - python-base-3.11-bullseye-container-image
+      - python-builder-3.11-bookworm-container-image
+      - python-base-3.11-bookworm-container-image
     provides: nodepool-container-image
     vars: &nodepool_image_vars
       promote_container_image_method: intermediate-registry
@@ -103,8 +103,8 @@
     description: Build container images and upload.
     timeout: *image_build_timeout
     requires:
-      - python-builder-3.11-bullseye-container-image
-      - python-base-3.11-bullseye-container-image
+      - python-builder-3.11-bookworm-container-image
+      - python-base-3.11-bookworm-container-image
     provides: nodepool-container-image
     vars: *nodepool_image_vars
     secrets:
@@ -133,8 +133,8 @@
       - zuul/nodepool
       - openstack/diskimage-builder
     requires:
-      - python-builder-3.11-bullseye-container-image
-      - python-base-3.11-bullseye-container-image
+      - python-builder-3.11-bookworm-container-image
+      - python-base-3.11-bookworm-container-image
     provides: nodepool-siblings-container-image
     vars:
       zuul_work_dir: "{{ zuul.projects['opendev.org/zuul/nodepool'].src_dir }}"
diff --git a/Dockerfile b/Dockerfile
index a882d4c84..ec777ed04 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,14 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM docker.io/opendevorg/python-builder:3.11-bullseye as builder
+FROM docker.io/opendevorg/python-builder:3.11-bookworm as builder
 # ============================================================================
 
 ARG ZUUL_SIBLINGS=""
 COPY . /tmp/src
 RUN assemble
 
-FROM docker.io/opendevorg/python-base:3.11-bullseye as nodepool-base
+FROM docker.io/opendevorg/python-base:3.11-bookworm as nodepool-base
 # ============================================================================
 
 COPY --from=builder /output/ /output
@@ -56,19 +56,11 @@ RUN echo "nodepool ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/nodepool-sudo \
 #  * vhd-util is required to create .vhd images, mostly used in
 #    Rackspace.  For full details see:
 #      https://docs.openstack.org/diskimage-builder/latest/developer/vhd_creation.html
-#
-#  * debootstrap unmounts /proc in the container causing havoc when
-#    using -minimal elements on debuntu.  Two unmerged fixes are in the bullseye version:
-#      https://salsa.debian.org/installer-team/debootstrap/-/merge_requests/26
-#      https://salsa.debian.org/installer-team/debootstrap/-/merge_requests/27
-#    are at least required.  We also need a later version to support jammy.  We
-#    grab from unstable for this reason.
 
 COPY tools/openstack-ci-core-ppa.asc /etc/apt/trusted.gpg.d/
 
 RUN \
   echo "deb http://ppa.launchpad.net/openstack-ci-core/vhd-util/ubuntu focal main" >> /etc/apt/sources.list \
-  && echo "deb http://deb.debian.org/debian bullseye-backports main" >> /etc/apt/sources.list \
   && apt-get update \
   && apt-get install -y \
       binutils \
@@ -85,7 +77,7 @@ RUN \
       xz-utils \
       zypper \
       zstd \
-      debootstrap/bullseye-backports
+      debootstrap
 
 # Podman install mainly for the "containerfile" elements of dib that
 # build images from extracts of upstream containers.