diff --git a/scripts/util.sh b/scripts/util.sh
index a7734a1..c435275 100644
--- a/scripts/util.sh
+++ b/scripts/util.sh
@@ -60,6 +60,6 @@ auto_enable_configs() {
 get_certificate() {
     echo "Getting certificate for domain $1 on behalf of user $2"
     certbot certonly --agree-tos --keep -n --text --email $2 --server \
-        https://acme-v02.api.letsencrypt.org/directory -d *.$1 -d $1 --http-01-port 1337 \
+        https://acme-v02.api.letsencrypt.org/directory -d "*.$1" -d $1 --http-01-port 1337 \
         --standalone --standalone-supported-challenges http-01 --debug
 }