diff --git a/build.py b/build.py
index 8fff7db..383bff5 100644
--- a/build.py
+++ b/build.py
@@ -1,5 +1,6 @@
 import csv
 import logging
+import os
 
 def wrap_url(u):
     if u.startswith("http"):
@@ -20,6 +21,7 @@ if __name__ == '__main__':
 
     logging.info('write file')
     with open('template/template.html') as inf:
+        os.mkdir('public')
         with open('public/index.html', 'w') as outf:
             outf.write(inf.read().replace('<!--Placeholder-->',subst))