diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index ff862af..ff00f0e 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -35,7 +35,7 @@ jobs:
       - uses: satackey/action-docker-layer-caching@v0.0.11
         continue-on-error: true
       - name: Install sass
-        run: pip install libsass==0.21.0
+        run: pip install libsass==0.21.0 awscli==1.20.20
       - name: Produce production CSS
         run: ./update_css
 
diff --git a/update_css b/update_css
index 05a9da1..a62687c 100755
--- a/update_css
+++ b/update_css
@@ -9,6 +9,7 @@ if [ "${HASWORN_ENV:-prod}" = 'dev' ]; then
 fi
 
 sha=$( shasum -a 256 /tmp/static.css | cut -c1-7 )
+which aws
 aws s3 cp \
     --acl public-read \
     --cache-control "max-age=31536000, immutable" \