diff --git a/setup/13_install_ssl_certs.sh b/setup/13_install_ssl_certs.sh
index 00dcdb95..9776c045 100755
--- a/setup/13_install_ssl_certs.sh
+++ b/setup/13_install_ssl_certs.sh
@@ -9,7 +9,9 @@ echo -e "\n-- Executing ${ORANGE}${OURNAME}${NC} subscript --"
 # Install acme.sh
 # NOTE: the version 3.0.7 has a bug with Nginx certs, so version is pinned to 3.0.6
 ACME_VERSION="3.0.6"
-curl https://raw.githubusercontent.com/acmesh-official/acme.sh/${ACME_VERSION}/acme.sh | sh -s -- --install --auto-upgrade 0
+wget https://raw.githubusercontent.com/acmesh-official/acme.sh/${ACME_VERSION}/acme.sh
+sh acme.sh --install --auto-upgrade 0
+rm -rf acme.sh
 
 # WildDuck TLS config
 echo 'cert="/etc/wildduck/certs/fullchain.pem"