diff --git a/zuul.d/project.yaml b/zuul.d/project.yaml
index 72f582d583..59bab7f950 100644
--- a/zuul.d/project.yaml
+++ b/zuul.d/project.yaml
@@ -99,7 +99,7 @@
         - system-config-build-image-jinja-init:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-build-image-python-base-3.7-buster
+              - name: system-config-build-image-python-base-3.9-bullseye
                 soft: true
         - system-config-build-image-gitea-init:
             dependencies:
@@ -120,12 +120,12 @@
         - system-config-build-image-haproxy-statsd:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-build-image-python-base-3.7-buster
+              - name: system-config-build-image-python-base-3.9-bullseye
                 soft: true
         - system-config-build-image-zookeeper-statsd:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-build-image-python-base-3.7-buster
+              - name: system-config-build-image-python-base-3.9-bullseye
                 soft: true
         - system-config-build-image-accessbot:
             dependencies:
@@ -248,7 +248,7 @@
         - system-config-upload-image-jinja-init:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-upload-image-python-base-3.7-buster
+              - name: system-config-upload-image-python-base-3.9-bullseye
                 soft: true
         - system-config-upload-image-gitea-init:
             dependencies:
@@ -267,12 +267,12 @@
         - system-config-upload-image-haproxy-statsd:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-upload-image-python-base-3.7-buster
+              - name: system-config-upload-image-python-base-3.9-bullseye
                 soft: true
         - system-config-upload-image-zookeeper-statsd:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-upload-image-python-base-3.7-buster
+              - name: system-config-upload-image-python-base-3.9-bullseye
                 soft: true
         - system-config-upload-image-accessbot:
             dependencies: