diff --git a/wireguard/rootfs/etc/cont-init.d/config.sh b/wireguard/rootfs/etc/cont-init.d/config.sh
index 6444d4e..21fd170 100644
--- a/wireguard/rootfs/etc/cont-init.d/config.sh
+++ b/wireguard/rootfs/etc/cont-init.d/config.sh
@@ -62,7 +62,7 @@ if bashio::config.has_value 'server.dns'; then
     done
 else
     dns=$(bashio::dns.host)
-    echo "DNS = ${dns}" >> ${config}
+    echo "DNS = ${dns}" >> "${config}"
 fi
 
 # Get the server's private key