diff --git a/entrypoint.sh.tmpl b/entrypoint.sh.tmpl
index c37c6fb..e3bb33c 100644
--- a/entrypoint.sh.tmpl
+++ b/entrypoint.sh.tmpl
@@ -1,35 +1,10 @@
-#!/bin/bash
+#!/bin/sh
 
-set -e
-
-file_env() {
-   local var="$1"
-   local fileVar="${var}_FILE"
-   local def="${2:-}"
-
-   if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
-      echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
-      exit 1
-   fi
-
-   local val="$def"
-
-   if [ "${!var:-}" ]; then
-      val="${!var}"
-   elif [ "${!fileVar:-}" ]; then
-      val="$(< "${!fileVar}")"
-   fi
-
-   export "$var"="$val"
-   unset "$fileVar"
-}
-
-file_env "ADMIN_PASSWORD"
-
-file_env "SECRET_KEY"
+export ADMIN_PASSWORD=$(cat /run/secrets/admin_password)
+export SECRET_KEY=$(cat /run/secrets/secret_key)
 
 {{ if eq (env "SMTP_ENABLED") "1" }}
-file_env "SMTP_PASSWORD"
+export SMTP_PASSWORD=$(cat /run/secrets/smtp_password)
 export MAILER_URI="smtp://{{ env "MAILER_FROM" }}:${SMTP_PASSWORD}@{{ env "MAILER_HOST" }}"
 {{ end }}