diff --git a/ci/tasks/prepare-container-bosh-docker-build-context.yml b/ci/tasks/prepare-container-bosh-docker-build-context.yml
index 2388a300eb9..65c4d6f15b4 100644
--- a/ci/tasks/prepare-container-bosh-docker-build-context.yml
+++ b/ci/tasks/prepare-container-bosh-docker-build-context.yml
@@ -5,7 +5,6 @@ image_resource:
   type: docker-image
   source:
     repository: ubuntu
-    tag: "14.04"
 
 inputs:
   - name: bosh-src
diff --git a/ci/tasks/prepare-container-docker-cpi-build-context.yml b/ci/tasks/prepare-container-docker-cpi-build-context.yml
index e273960ead5..edf21ff27ca 100644
--- a/ci/tasks/prepare-container-docker-cpi-build-context.yml
+++ b/ci/tasks/prepare-container-docker-cpi-build-context.yml
@@ -5,7 +5,6 @@ image_resource:
   type: docker-image
   source:
     repository: ubuntu
-    tag: xenial
 
 inputs:
   - name: bosh-src