diff --git a/ci-conda.Dockerfile b/ci-conda.Dockerfile
index 321ea46..4291bb8 100644
--- a/ci-conda.Dockerfile
+++ b/ci-conda.Dockerfile
@@ -4,9 +4,9 @@ ARG PYTHON_VER=notset
 ARG YQ_VER
 ARG AWS_CLI_VER
 
-FROM mikefarah/yq:${YQ_VER} as yq
+FROM mikefarah/yq:${YQ_VER} AS yq
 
-FROM amazon/aws-cli:${AWS_CLI_VER} as aws-cli
+FROM amazon/aws-cli:${AWS_CLI_VER} AS aws-cli
 
 FROM rapidsai/miniforge-cuda:cuda${CUDA_VER}-base-${LINUX_VER}-py${PYTHON_VER}
 
diff --git a/ci-wheel.Dockerfile b/ci-wheel.Dockerfile
index d224f2b..59e248e 100644
--- a/ci-wheel.Dockerfile
+++ b/ci-wheel.Dockerfile
@@ -4,7 +4,7 @@ ARG LINUX_VER=notset
 ARG BASE_IMAGE=nvcr.io/nvidia/cuda:${CUDA_VER}-devel-${LINUX_VER}
 ARG AWS_CLI_VER
 
-FROM amazon/aws-cli:${AWS_CLI_VER} as aws-cli
+FROM amazon/aws-cli:${AWS_CLI_VER} AS aws-cli
 
 FROM ${BASE_IMAGE}
 
diff --git a/citestwheel.Dockerfile b/citestwheel.Dockerfile
index 26516b7..a14b5e2 100644
--- a/citestwheel.Dockerfile
+++ b/citestwheel.Dockerfile
@@ -4,7 +4,7 @@ ARG LINUX_VER=notset
 ARG BASE_IMAGE=nvcr.io/nvidia/cuda:${CUDA_VER}-devel-${LINUX_VER}
 ARG AWS_CLI_VER
 
-FROM amazon/aws-cli:${AWS_CLI_VER} as aws-cli
+FROM amazon/aws-cli:${AWS_CLI_VER} AS aws-cli
 
 FROM ${BASE_IMAGE}