diff --git a/xos/services/vpn/ca.sh b/xos/services/vpn/ca.sh
index 7c62d4e..fc94613 100644
--- a/xos/services/vpn/ca.sh
+++ b/xos/services/vpn/ca.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 rm -f /usr/share/easy-rsa/vars
 cp -r /usr/share/easy-rsa/* .
-source ./vars
-./clean-all
-./build-ca --batch
+source vars
+sh clean-all
+sh build-ca --batch
 cat keys/ca.crt