diff --git a/setup/nginx-to-caddy/validate_caddy.sh b/setup/nginx-to-caddy/validate_caddy.sh
index 778e562..0022f7e 100755
--- a/setup/nginx-to-caddy/validate_caddy.sh
+++ b/setup/nginx-to-caddy/validate_caddy.sh
@@ -10,7 +10,7 @@ FORMAT_FILE=true
 USE_DOCKER=false
 DO_ADAPT=true
 DO_VALIDATE=true
-CADDY_IMAGE="caddy:2"
+CADDY_IMAGE="slothcroissant/caddy-cloudflaredns:latest"
 
 usage() {
   cat <<USAGE
@@ -24,7 +24,7 @@ Options:
   --no-adapt          Skip caddy adapt
   --no-validate       Skip caddy validate
   --docker            Use Docker image instead of local caddy binary
-  --image=NAME        Docker image when --docker is used (default: caddy:2)
+  --image=NAME        Docker image when --docker is used (default: slothcroissant/caddy-cloudflaredns:latest)
   --help, -h          Show help
 USAGE
 }
@@ -47,12 +47,21 @@ if [[ ! -f "$CONFIG_FILE" ]]; then
   exit 1
 fi
 
+CONFIG_FILE="$(cd "$(dirname "$CONFIG_FILE")" && pwd)/$(basename "$CONFIG_FILE")"
+
 if [[ "$USE_DOCKER" == "true" ]]; then
   require_cmd docker
+  docker_env_args=()
+  if [[ -n "${CF_API_TOKEN:-}" ]]; then
+    docker_env_args+=( -e "CF_API_TOKEN=${CF_API_TOKEN}" )
+  elif [[ -n "${CLOUDFLARE_API_TOKEN:-}" ]]; then
+    docker_env_args+=( -e "CF_API_TOKEN=${CLOUDFLARE_API_TOKEN}" )
+  fi
 
   if [[ "$FORMAT_FILE" == "true" ]]; then
     log_info "Formatting Caddyfile with Docker..."
     docker run --rm \
+      "${docker_env_args[@]}" \
       -v "$CONFIG_FILE:/etc/caddy/Caddyfile" \
       "$CADDY_IMAGE" caddy fmt --overwrite /etc/caddy/Caddyfile
   fi
@@ -60,6 +69,7 @@ if [[ "$USE_DOCKER" == "true" ]]; then
   if [[ "$DO_ADAPT" == "true" ]]; then
     log_info "Adapting Caddyfile (Docker)..."
     docker run --rm \
+      "${docker_env_args[@]}" \
       -v "$CONFIG_FILE:/etc/caddy/Caddyfile:ro" \
       "$CADDY_IMAGE" caddy adapt --config /etc/caddy/Caddyfile --adapter caddyfile >/dev/null
   fi
@@ -67,6 +77,7 @@ if [[ "$USE_DOCKER" == "true" ]]; then
   if [[ "$DO_VALIDATE" == "true" ]]; then
     log_info "Validating Caddyfile (Docker)..."
     docker run --rm \
+      "${docker_env_args[@]}" \
       -v "$CONFIG_FILE:/etc/caddy/Caddyfile:ro" \
       "$CADDY_IMAGE" caddy validate --config /etc/caddy/Caddyfile --adapter caddyfile
   fi