diff --git a/deploy.sh b/deploy.sh
index c651dfa..f577e0f 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -111,7 +111,7 @@ fetch_ipv6() {
 generate_passwd() {
 	# Generate a random password for the install-<MAC>.conf file.
 	# Doesn't take variables
-	tr -cd '[:alnum:]' < /dev/urandom | fold -w 20 | head -n 1
+	tr -cd '[:alnum:][!#$%@&()+{}~<>]' < /dev/urandom | fold -w 20 | head -n 1
 }
 
 check_instance() {