diff --git a/.zuul.yaml b/.zuul.yaml
index 7a7e264ca7..4901a1ed8d 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -174,8 +174,8 @@
     description: Build Docker images.
     allowed-projects: openstack/python-openstackclient
     requires:
-      - python-builder-container-image
-      - python-base-container-image
+      - python-builder-3.7-container-image
+      - python-base-3.7-container-image
     provides: osc-container-image
     vars: &osc_image_vars
       docker_images:
@@ -188,8 +188,8 @@
     description: Build Docker images and upload to Docker Hub.
     allowed-projects: openstack/python-openstackclient
     requires:
-      - python-builder-container-image
-      - python-base-container-image
+      - python-builder-3.7-container-image
+      - python-base-3.7-container-image
     provides: osc-container-image
     secrets:
       - name: docker_credentials
diff --git a/Dockerfile b/Dockerfile
index 9ff8084c30..ca60bb0ecb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,12 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM docker.io/opendevorg/python-builder as builder
+FROM docker.io/opendevorg/python-builder:3.7 as builder
 
 COPY . /tmp/src
 RUN assemble
 
-FROM docker.io/opendevorg/python-base
+FROM docker.io/opendevorg/python-base:3.7
 
 COPY --from=builder /output/ /output
 RUN /output/install-from-bindep