diff --git a/management/mail_log.py b/management/mail_log.py
index cfd4ca61..24d6d830 100755
--- a/management/mail_log.py
+++ b/management/mail_log.py
@@ -690,7 +690,7 @@ def print_user_table(users, data=None, sub_data=None, activity=None, latest=None
                 data_accum[col] += d[row]
 
         try:
-            if None not in [latest, earliest]:
+            if None not in [latest, earliest]: # noqa PLR6201
                 vert_pos = len(line)
                 e = earliest[row]
                 l = latest[row]
@@ -743,7 +743,7 @@ def print_user_table(users, data=None, sub_data=None, activity=None, latest=None
         else:
             header += l.rjust(max(5, len(l) + 1, col_widths[col]))
 
-    if None not in [latest, earliest]:
+    if None not in [latest, earliest]: # noqa PLR6201
         header += " │ timespan   "
 
     lines.insert(0, header.rstrip())
@@ -768,7 +768,7 @@ def print_user_table(users, data=None, sub_data=None, activity=None, latest=None
         footer += temp.format(data_accum[row])
 
     try:
-        if None not in [latest, earliest]:
+        if None not in [latest, earliest]: # noqa PLR6201
             max_l = max(latest)
             min_e = min(earliest)
             timespan = relativedelta(max_l, min_e)
diff --git a/management/web_update.py b/management/web_update.py
index b73fda3a..e88390b2 100644
--- a/management/web_update.py
+++ b/management/web_update.py
@@ -186,6 +186,7 @@ def make_domain_config(domain, templates, ssl_certificates, env):
 				pass_http_host_header = False
 				proxy_redirect_off = False
 				frame_options_header_sameorigin = False
+				web_sockets = False
 				m = re.search("#(.*)$", url)
 				if m:
 					for flag in m.group(1).split(","):
@@ -195,6 +196,8 @@ def make_domain_config(domain, templates, ssl_certificates, env):
 							proxy_redirect_off = True
 						elif flag == "frame-options-sameorigin":
 							frame_options_header_sameorigin = True
+						elif flag == "web-sockets":
+							web_sockets = True
 					url = re.sub("#(.*)$", "", url)
 
 				nginx_conf_extra += "\tlocation %s {" % path
@@ -205,6 +208,10 @@ def make_domain_config(domain, templates, ssl_certificates, env):
 					nginx_conf_extra += "\n\t\tproxy_set_header Host $http_host;"
 				if frame_options_header_sameorigin:
 					nginx_conf_extra += "\n\t\tproxy_set_header X-Frame-Options SAMEORIGIN;"
+				if web_sockets:
+					nginx_conf_extra += "\n\t\tproxy_http_version 1.1;"
+					nginx_conf_extra += "\n\t\tproxy_set_header Upgrade $http_upgrade;"
+					nginx_conf_extra += "\n\t\tproxy_set_header Connection 'Upgrade';"
 				nginx_conf_extra += "\n\t\tproxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;"
 				nginx_conf_extra += "\n\t\tproxy_set_header X-Forwarded-Host $http_host;"
 				nginx_conf_extra += "\n\t\tproxy_set_header X-Forwarded-Proto $scheme;"
diff --git a/setup/zpush.sh b/setup/zpush.sh
index 3c66a5e6..efb46663 100755
--- a/setup/zpush.sh
+++ b/setup/zpush.sh
@@ -26,13 +26,13 @@ source /etc/mailinabox.conf # load global vars
 
 echo "Installing Z-Push (Exchange/ActiveSync server)..."
 apt_install \
-       php"${PHP_VER}"-soap php"${PHP_VER}"-imap libawl-php php"$PHP_VER"-xml
+       php"${PHP_VER}"-soap php"${PHP_VER}"-imap libawl-php php"$PHP_VER"-xml php"${PHP_VER}"-intl
 
 phpenmod -v "$PHP_VER" imap
 
 # Copy Z-Push into place.
-VERSION=2.7.1
-TARGETHASH=f15c566b1ad50de24f3f08f505f0c3d8155c2d0d
+VERSION=2.7.3
+TARGETHASH=9d4bec41935e9a4e07880c5ff915bcddbda4443b
 needs_update=0 #NODOC
 if [ ! -f /usr/local/lib/z-push/version ]; then
 	needs_update=1 #NODOC