Update default to ACMEv2 server
diff --git a/certbot/constants.py b/certbot/constants.py
index d31faa71c26..9760f773931 100644
--- a/certbot/constants.py
+++ b/certbot/constants.py
@@ -88,7 +88,7 @@
     config_dir="/etc/letsencrypt",
     work_dir="/var/lib/letsencrypt",
     logs_dir="/var/log/letsencrypt",
-    server="https://acme-v01.api.letsencrypt.org/directory",
+    server="https://acme-v02.api.letsencrypt.org/directory",
 
     # Plugins parsers
     configurator=None,

Fixes #5369.