diff --git a/.kokoro/release/release-agentplatform.cfg b/.kokoro/release/release-agentplatform.cfg
index f2fc326d39..c6f0c3a7ca 100644
--- a/.kokoro/release/release-agentplatform.cfg
+++ b/.kokoro/release/release-agentplatform.cfg
@@ -4,10 +4,12 @@
 
 build_file: "google3/third_party/py/google/cloud/aiplatform/.kokoro/release/agentplatform.sh"
 
-# Python image: this builds an sdist and a wheel, so the JVM-oriented images
-# used by other release jobs are not suitable.
+# 22.04 rather than 20.04: the package requires Python >= 3.10, and so do the
+# current releases of `build` and `twine`. On 20.04's Python 3.8 pip resolves
+# back to build 1.2.2.post1, the last release that still supported 3.8. This
+# image carries python3, pip and pyenv.
 container_properties {
-  docker_image: "us-central1-docker.pkg.dev/kokoro-container-bakery/kokoro/ubuntu/ubuntu2004/python:current"
+  docker_image: "us-central1-docker.pkg.dev/kokoro-container-bakery/kokoro/ubuntu/ubuntu2204/full:current"
 }
 
 fileset_artifacts: {