diff --git a/CHANGELOG.md b/CHANGELOG.md
index bda29eb..60fc841 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### v3.9.x - [Unreleased]
 
+#### Changed
+
+- Date format in backup name : /backup/30Aug2019035932 -> /backup/30Aug2019-03-59-32
+
+#### Fixed
+
+- cache-enabler plugin not installed and configured with `wo site update site.tld --wpce`
+
 ### v3.9.8.5 - 2019-08-30
 
 #### Changed
diff --git a/wo/cli/plugins/site.py b/wo/cli/plugins/site.py
index 5df3201..fd991f3 100644
--- a/wo/cli/plugins/site.py
+++ b/wo/cli/plugins/site.py
@@ -1539,7 +1539,7 @@ class WOSiteUpdateController(CementBaseController):
                                           "enable_purge": 1,
                                           "enable_map": "0",
                                           "enable_log": 0,
-                                          "enable_stamp": 0,
+                                          "enable_stamp": 1,
                                           "purge_homepage_on_new": 1,
                                           "purge_homepage_on_edit": 1,
                                           "purge_homepage_on_del": 1,
@@ -1580,7 +1580,7 @@ class WOSiteUpdateController(CementBaseController):
                                           "enable_purge": 1,
                                           "enable_map": "0",
                                           "enable_log": 0,
-                                          "enable_stamp": 0,
+                                          "enable_stamp": 1,
                                           "purge_homepage_on_new": 1,
                                           "purge_homepage_on_edit": 1,
                                           "purge_homepage_on_del": 1,
diff --git a/wo/cli/plugins/site_functions.py b/wo/cli/plugins/site_functions.py
index 219dd81..095479d 100644
--- a/wo/cli/plugins/site_functions.py
+++ b/wo/cli/plugins/site_functions.py
@@ -6,6 +6,7 @@ import json
 import re
 import string
 import subprocess
+import csv
 from subprocess import CalledProcessError
 
 from wo.cli.plugins.sitedb import getSiteInfo
@@ -1455,6 +1456,38 @@ def setupLetsEncrypt(self, wo_domain_name, subdomain=False, wildcard=False,
                   "you are running Let\'s Encrypt Client "
                   "\n to allow it to verify the site automatically.")
 
+# check if a wildcard exist to secure a new subdomain
+
+
+def checkWildcardExist(self, wo_domain_name):
+
+    wo_acme_exec = ("/etc/letsencrypt/acme.sh --config-home "
+                    "'/etc/letsencrypt/config'")
+    try:
+        # export certificates list from acme.sh
+        WOShellExec.cmd_exec(self, "{0} ".format(wo_acme_exec) +
+                             "--list --list-raw > /var/lib/wo/cert.csv")
+    except CommandExecutionError as e:
+        Log.debug(self, "{0}".format(e))
+        Log.error(self, "Failed to export cert list")
+
+    # define new csv dialect
+    csv.register_dialect('acmeconf', delimiter='|')
+    # open file
+    with open('/var/lib/wo/cert.csv', 'rt') as wo_cert:
+        reader = csv.reader(wo_cert, 'acmeconf')
+        wo_wildcard = "*.{0}".format(wo_domain_name)
+    try:
+        for row in reader:
+            if wo_wildcard in row[2]:
+                break
+                return True
+            else:
+                return False
+    except csv.Error as e:
+        Log.debug(self, "{0}".format(e))
+        Log.error(self, "Failed to read cert list")
+
 # letsencrypt cert renewal