From ad39f5a8218bf3a8c9183af0e9ecc4ca6f874904 Mon Sep 17 00:00:00 2001
From: CodeKevin <kevin@codekevin.com>
Date: Sun, 8 May 2016 18:25:58 -0400
Subject: [PATCH] Relaxing container name restrictions

---
 CTFd/admin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CTFd/admin.py b/CTFd/admin.py
index 6f72410d..c963864a 100644
--- a/CTFd/admin.py
+++ b/CTFd/admin.py
@@ -275,7 +275,7 @@ def delete_container(container_id):
 @admins_only
 def new_container():
     name = request.form.get('name')
-    if not name.isalpha():
+    if set(name) <= set('abcdefghijklmnopqrstuvwxyz0123456789-_'):
         return redirect('/admin/containers')
     buildfile = request.form.get('buildfile')
     files = request.files.getlist('files[]')