diff --git a/Dockerfile b/Dockerfile
index dd9baef..c201ce5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,12 +13,12 @@
 # You should have received a copy of the GNU General Public License
 # along with this software.  If not, see <http://www.gnu.org/licenses/>.
 
-FROM docker.io/opendevorg/python-builder:3.11-bullseye as builder
+FROM docker.io/opendevorg/python-builder:3.11-bookworm as builder
 
 COPY . /tmp/src
 RUN assemble
 
-FROM docker.io/opendevorg/python-base:3.11-bullseye as zuul-registry
+FROM docker.io/opendevorg/python-base:3.11-bookworm as zuul-registry
 
 COPY --from=builder /output/ /output
 RUN /output/install-from-bindep