diff --git a/scripts/docker-registry-local-up.sh b/scripts/docker-registry-local-up.sh
index 89501ab..2ed08c5 100644
--- a/scripts/docker-registry-local-up.sh
+++ b/scripts/docker-registry-local-up.sh
@@ -8,19 +8,34 @@ COMPOSE_FILE="${ROOT_DIR}/docker-compose.registry.local.yml"
 AUTH_DIR="${ROOT_DIR}/docker/registry/auth"
 AUTH_FILE="${AUTH_DIR}/htpasswd"
 
+read_env_value() {
+  local key="$1"
+  local line
+
+  line="$(grep -E "^${key}=" "${ENV_FILE}" | tail -n 1 || true)"
+  line="${line#*=}"
+
+  if [[ "${line}" == \"*\" && "${line}" == *\" ]]; then
+    line="${line:1:-1}"
+  elif [[ "${line}" == \'*\' && "${line}" == *\' ]]; then
+    line="${line:1:-1}"
+  fi
+
+  printf '%s' "${line}"
+}
+
 if [[ ! -f "${ENV_FILE}" ]]; then
   echo "Missing ${ENV_FILE}" >&2
   exit 1
 fi
 
-set -a
-source "${ENV_FILE}"
-set +a
-
 mkdir -p "${AUTH_DIR}"
 
-if [[ -n "${REGISTRY_USER:-}" && -n "${REGISTRY_PASSWORD:-}" ]]; then
-  docker run --rm --entrypoint htpasswd httpd:2-alpine -Bbn "${REGISTRY_USER}" "${REGISTRY_PASSWORD}" > "${AUTH_FILE}"
+REGISTRY_USER_VALUE="$(read_env_value REGISTRY_USER)"
+REGISTRY_PASSWORD_VALUE="$(read_env_value REGISTRY_PASSWORD)"
+
+if [[ -n "${REGISTRY_USER_VALUE}" && -n "${REGISTRY_PASSWORD_VALUE}" ]]; then
+  docker run --rm --entrypoint htpasswd httpd:2-alpine -Bbn "${REGISTRY_USER_VALUE}" "${REGISTRY_PASSWORD_VALUE}" > "${AUTH_FILE}"
   chmod 600 "${AUTH_FILE}"
 elif [[ ! -f "${AUTH_FILE}" ]]; then
   echo "Set REGISTRY_USER and REGISTRY_PASSWORD in ${ENV_FILE} or create ${AUTH_FILE} manually." >&2