diff --git a/.buildkite/steps/publish.sh b/.buildkite/steps/publish.sh
index 281f96321..67a73a190 100755
--- a/.buildkite/steps/publish.sh
+++ b/.buildkite/steps/publish.sh
@@ -4,8 +4,8 @@ set -euo pipefail
 s3_upload_templates() {
   local bucket_prefix="${1:-}"
 
-  aws s3 cp --content-type 'text/yaml' --acl public-read build/mappings.yml "s3://${BUILDKITE_AWS_STACK_TEMPLATE_BUCKET}/${bucket_prefix}mappings.yml"
-  aws s3 cp --content-type 'text/yaml' --acl public-read build/aws-stack.yml "s3://${BUILDKITE_AWS_STACK_TEMPLATE_BUCKET}/${bucket_prefix}aws-stack.yml"
+  aws s3 cp --content-type 'text/yaml' build/mappings.yml "s3://${BUILDKITE_AWS_STACK_TEMPLATE_BUCKET}/${bucket_prefix}mappings.yml"
+  aws s3 cp --content-type 'text/yaml' build/aws-stack.yml "s3://${BUILDKITE_AWS_STACK_TEMPLATE_BUCKET}/${bucket_prefix}aws-stack.yml"
 }
 
 echo "--- :git: Checking and fetching git tags"