diff --git a/README.md b/README.md
index b6e3f65..9801996 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ # vegardit/openldap <a href="https://github.com/vegardit/docker-openldap/" title
 
 ## <a name="what-is-it"></a>What is it?
 
-Opinionated docker image is currently based on the [Debian](https://www.debian.org/) docker image [`debian:bullseye-slim`](https://hub.docker.com/_/debian?tab=tags&name=bullseye-slim) to run an [OpenLDAP 2.4](https://www.openldap.org/doc/admin24/) server.
+Opinionated docker image is currently based on the [Debian](https://www.debian.org/) docker image [`debian:bookworm-slim`](https://hub.docker.com/_/debian?tab=tags&name=bookworm-slim) to run an [OpenLDAP 2.5](https://www.openldap.org/doc/admin25/) server.
 
 It is automatically built **daily** to include the latest OS security fixes.
 
@@ -217,7 +217,7 @@ ### <a name="troubleshooting"></a>Troubleshooting
 
 ## <a name="references"></a>References
 
-- OpenLDAP Software 2.4 Administrator's Guide https://www.openldap.org/doc/admin24/guide.html
+- OpenLDAP Software 2.5 Administrator's Guide https://www.openldap.org/doc/admin25/guide.html
 - OpenLDAP Online Configuration Reference https://tylersguides.com/guides/openldap-online-configuration-reference/
 - slapd-config(5) - Linux man page https://linux.die.net/man/5/slapd-config
 
diff --git a/build-image.sh b/build-image.sh
index 592d293..d0af70b 100644
--- a/build-image.sh
+++ b/build-image.sh
@@ -18,7 +18,7 @@ source "$shared_lib/lib/build-image-init.sh"
 # specify target repo and image name
 #################################################
 image_repo=${DOCKER_IMAGE_REPO:-vegardit/openldap}
-base_image_name=${DOCKER_BASE_IMAGE:-debian:bullseye-slim}
+base_image_name=${DOCKER_BASE_IMAGE:-debian:bookworm-slim}
 base_image_tag=${base_image_name#*:}
 image_name=$image_repo:latest
 
@@ -63,8 +63,8 @@ echo "ldap_version=$ldap_version"
 #################################################
 declare -a tags=()
 tags+=($image_name) # :latest
-tags+=($image_repo:${ldap_version})       # :2.4.47
-tags+=($image_repo:${ldap_version%.*}.x)  # :2.4.x
+tags+=($image_repo:${ldap_version})       # :2.5.12
+tags+=($image_repo:${ldap_version%.*}.x)  # :2.5.x
 tags+=($image_repo:${ldap_version%%.*}.x) # :2.x
 
 for tag in ${tags[@]}; do
diff --git a/image/Dockerfile b/image/Dockerfile
index 356f2c2..1d3dc07 100644
--- a/image/Dockerfile
+++ b/image/Dockerfile
@@ -8,8 +8,8 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-ArtifactOfProjectHomePage: https://github.com/vegardit/docker-openldap
 
-# https://hub.docker.com/_/debian?tab=tags&name=bullseye-slim
-ARG BASE_IMAGE=debian:bullseye-slim
+# https://hub.docker.com/_/debian?tab=tags&name=bookworm-slim
+ARG BASE_IMAGE=debian:bookworm-slim
 
 # see https://github.com/hadolint/hadolint/wiki/DL3006
 # hadolint ignore=DL3006
diff --git a/image/run.sh b/image/run.sh
index 191f05a..1f46669 100644
--- a/image/run.sh
+++ b/image/run.sh
@@ -123,7 +123,6 @@ if [ ! -e /etc/ldap/slapd.d/initialized ]; then
       ldif add    -Y EXTERNAL /opt/ldifs/schema_rfc2307bis02.ldif
    fi
 
-   ldif add    -Y EXTERNAL /etc/ldap/schema/ppolicy.ldif
    ldif add    -Y EXTERNAL /opt/ldifs/schema_sudo.ldif
    ldif add    -Y EXTERNAL /opt/ldifs/schema_ldapPublicKey.ldif