diff --git a/roles/flyspray/templates/php-fpm.conf.j2 b/roles/flyspray/templates/php-fpm.conf.j2
index 40bb0705..beee2c0b 100644
--- a/roles/flyspray/templates/php-fpm.conf.j2
+++ b/roles/flyspray/templates/php-fpm.conf.j2
@@ -21,4 +21,4 @@ php_admin_value[opcache.interned_strings_buffer] = 8
 php_admin_value[opcache.max_accelerated_files] = 200
 php_admin_value[opcache.revalidate_freq] = 60
 php_admin_value[opcache.fast_shutdown] = 1
-php_admin_value[disable_functions] = passthru, exec, proc_open, shell_exec, system, popen
+php_admin_value[disable_functions] = virtual, dl, suexec, popen, proc_nice, proc_open, proc_terminate, exec, passthru, system, show_source, shell_exec, escapeshellcmd, escapeshellarg