diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ddb38ab..914158e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,8 +29,13 @@ env:
   CURL_CACHE_DIR: ~/.cache/curl
   IMAGE_NAME: cisagov/code-gov-update
   PIP_CACHE_DIR: ~/.cache/pip
-  PLATFORMS: "linux/386,linux/amd64,linux/arm/v6,\
-  linux/arm/v7,linux/arm64/v8,linux/ppc64le,linux/s390x"
+  # We have dropped support for the linux/arm/v6, linux/ppc64le, and linux/s390x
+  # platforms until the run time for the build-push-all job can get below the six
+  # hour limit that exists for GitHub Actions runners. This could either be through
+  # some kind of optimization, when we matrix out the build so each platform runs
+  # on its own runner, or if we start using our own runners that have a higher
+  # time limit. Please see #150 for tracking.
+  PLATFORMS: "linux/386,linux/amd64,linux/arm/v7,linux/arm64/v8"
   PRE_COMMIT_CACHE_DIR: ~/.cache/pre-commit
   RUN_TMATE: ${{ secrets.RUN_TMATE }}
 
diff --git a/README.md b/README.md
index e1f82b4..a58a9c0 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 [![Docker Pulls](https://img.shields.io/docker/pulls/cisagov/code-gov-update)](https://hub.docker.com/r/cisagov/code-gov-update)
 [![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/cisagov/code-gov-update)](https://hub.docker.com/r/cisagov/code-gov-update)
-[![Platforms](https://img.shields.io/badge/platforms-386%20%7C%20amd64%20%7C%20arm%2Fv6%20%7C%20arm%2Fv7%20%7C%20arm64%2Fv8%20%7C%20ppc64le%20%7C%20s390x-blue)](https://hub.docker.com/r/cisagov/code-gov-update/tags)
+[![Platforms](https://img.shields.io/badge/platforms-386%20%7C%20amd64%20%7C%20arm%2Fv6%20%7C%20arm%2Fv7%20%7C%20arm64%2Fv8-blue)](https://hub.docker.com/r/cisagov/code-gov-update/tags)
 
 This project contains code for updating the DHS
 [code.gov](https://code.gov) inventory published