diff --git a/Dockerfile b/Dockerfile
index aca57ab..b400370 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,5 @@ ARG DOMAIN
 ARG GD_Key
 ARG GD_Secret
 
-RUN ["export", "${GD_Key}"]
-RUN ["export", "${GD_Secret}"]
+RUN export ${GD_Key} && export ${GD_Secret}
 RUN ["acme.sh", "--issue", "--dns", "dns_gd", "-d", "${DOMAIN}", "--reloadcmd", "'/usr/syno/sbin/synoservicecfg --reload httpd-sys'"]