diff --git a/ssh_lib/nginx.py b/ssh_lib/nginx.py
index fdb263a..8b2c722 100644
--- a/ssh_lib/nginx.py
+++ b/ssh_lib/nginx.py
@@ -87,7 +87,7 @@ def generate_self_signed_cert(c):
     if not exists(c, '/etc/nginx/ssl/dummy.cert'):
         c.sudo('mkdir -p /etc/nginx/ssl')
         c.sudo(
-            'openssl req -x509 -nodes -days 365 -newkey rsa:2048 '
+            'openssl req -x509 -nodes -days 3650 -newkey rsa:2048 '
             '-keyout /etc/nginx/ssl/dummy.key -out /etc/nginx/ssl/dummy.cert '
             '-subj "/C=US/ST=Dummy/L=Dummy/O=Dummy/CN=example.com"',
             hide=True,