diff --git a/.github/workflows/docker_thredds_test_action.yml b/.github/workflows/docker_thredds_test_action.yml
index 6ed046f..a608e08 100644
--- a/.github/workflows/docker_thredds_test_action.yml
+++ b/.github/workflows/docker_thredds_test_action.yml
@@ -13,6 +13,7 @@ jobs:
       - name: Execute Packer
         run: |
           cd packer
+          packer plugins install github.com/hashicorp/docker
           packer build --only=docker-github-action thredds-test-env.json
           docker login --username ${{ github.actor }} --password ${{ secrets.GITHUB_TOKEN }} ghcr.io
           docker push ghcr.io/unidata/thredds-test-action:v2