diff --git a/data/actionsmap/yunohost.yml b/data/actionsmap/yunohost.yml
index bff87d4e8..fd206603d 100644
--- a/data/actionsmap/yunohost.yml
+++ b/data/actionsmap/yunohost.yml
@@ -1168,7 +1168,7 @@ dyndns:
                     default: "dyndns.yunohost.org"
                 -d:
                     full: --domain
-                    help: Full domain to subscribe with
+                    help: Full domain to update
                     extra:
                         pattern: *pattern_domain
                 -k:
diff --git a/debian/changelog b/debian/changelog
index 03539feba..81124e12b 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,15 @@
+moulinette-yunohost (2.2.4) stable; urgency=low
+
+  [ Jérôme Lebleu ]
+  * [fix] Update first registered domain with DynDNS instead of current_host
+  * [fix] Set found private key and don't validate it in dyndns_update
+  * [fix] Use dyndns.yunohost.org instead of dynhost.yunohost.org
+
+  [ opi ]
+  * [fix] Catch ConnectionError from requests package
+
+ -- Jérôme Lebleu <jerome@yunohost.org>  Sun, 27 Mar 2016 16:30:42 +0200
+
 yunohost (2.3.11.2) testing; urgency=low
 
   * [fix] Don't fail dnsmasq regen if IPv4/6 cannot be retrieved
@@ -383,12 +395,6 @@ moulinette-yunohost (2.3.0) testing; urgency=low
 
  -- Jérôme Lebleu <jerome.lebleu@mailoo.org>  Tue, 08 Sep 2015 14:19:28 +0200
 
-moulinette-yunohost (2.2.3-1) stable; urgency=low
-
-  * [fix] Catch ConnectionError from requests package
-
- -- opi <opi@zeropi.net>  Sun, 06 Mar 2016 21:51:06 +0100
-
 moulinette-yunohost (2.2.3) stable; urgency=low
 
   * [fix] Catch proper exception in backup_list (fix #65)
diff --git a/locales/en.json b/locales/en.json
index 5859a10f2..10c056d9b 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -69,6 +69,8 @@
     "no_ipv6_connectivity": "IPv6 connectivity is not available",
 
     "dyndns_key_generating" : "DNS key is being generated, it may take a while...",
+    "dyndns_key_not_found" : "DNS key not found for the domain",
+    "dyndns_no_domain_registered": "No domain has been registered with DynDNS",
     "dyndns_unavailable" : "Unavailable DynDNS subdomain",
     "dyndns_registration_failed" : "Unable to register DynDNS domain: {error:s}",
     "dyndns_registered" : "DynDNS domain successfully registered",
diff --git a/src/yunohost/dyndns.py b/src/yunohost/dyndns.py
index 4d95ebeab..878bc577e 100644
--- a/src/yunohost/dyndns.py
+++ b/src/yunohost/dyndns.py
@@ -24,12 +24,12 @@
     Subscribe and Update DynDNS Hosts
 """
 import os
-import requests
 import re
 import json
 import glob
 import base64
 import errno
+import requests
 import subprocess
 
 from moulinette.core import MoulinetteError
@@ -62,6 +62,10 @@ class IPRouteLine(object):
         for k, v in self.m.groupdict().items():
             setattr(self, k, v)
 
+re_dyndns_private_key = re.compile(
+    r'.*/K(?P<domain>[^\s\+]+)\.\+157.+\.private$'
+)
+
 
 def dyndns_subscribe(subscribe_host="dyndns.yunohost.org", domain=None, key=None):
     """
@@ -120,17 +124,13 @@ def dyndns_update(dyn_host="dyndns.yunohost.org", domain=None, key=None,
     Update IP on DynDNS platform
 
     Keyword argument:
-        domain -- Full domain to subscribe with
+        domain -- Full domain to update
         dyn_host -- Dynette DNS server to inform
         key -- Public DNS key
         ipv4 -- IP address to send
         ipv6 -- IPv6 address to send
 
     """
-    if domain is None:
-        with open('/etc/yunohost/current_host', 'r') as f:
-            domain = f.readline().rstrip()
-
     # IPv4
     if ipv4 is None:
         ipv4 = get_public_ip()
@@ -168,6 +168,37 @@ def dyndns_update(dyn_host="dyndns.yunohost.org", domain=None, key=None,
         old_ipv6 = '0000:0000:0000:0000:0000:0000:0000:0000'
 
     if old_ip != ipv4 or old_ipv6 != ipv6:
+        if domain is None:
+            # Retrieve the first registered domain
+            for path in glob.iglob('/etc/yunohost/dyndns/K*.private'):
+                match = re_dyndns_private_key.match(path)
+                if not match:
+                    continue
+                _domain = match.group('domain')
+                try:
+                    # Check if domain is registered
+                    if requests.get('https://{0}/test/{1}'.format(
+                            dyn_host, _domain)).status_code == 200:
+                        continue
+                except requests.ConnectionError:
+                    raise MoulinetteError(errno.ENETUNREACH,
+                                          m18n.n('no_internet_connection'))
+                domain = _domain
+                key = path
+                break
+            if not domain:
+                raise MoulinetteError(errno.EINVAL,
+                                      m18n.n('dyndns_no_domain_registered'))
+
+        if key is None:
+            keys = glob.glob(
+                '/etc/yunohost/dyndns/K{0}.+*.private'.format(domain))
+            if len(keys) > 0:
+                key = keys[0]
+        if not key:
+            raise MoulinetteError(errno.EIO,
+                                  m18n.n('dyndns_key_not_found'))
+
         host = domain.split('.')[1:]
         host = '.'.join(host)
         lines = [
@@ -209,11 +240,7 @@ def dyndns_update(dyn_host="dyndns.yunohost.org", domain=None, key=None,
             for line in lines:
                 zone.write(line + '\n')
 
-        if key is None:
-            private_key_file = glob.glob('/etc/yunohost/dyndns/*.private')[0]
-        else:
-            private_key_file = key
-        if os.system('/usr/bin/nsupdate -k %s /etc/yunohost/dyndns/zone' % private_key_file) == 0:
+        if os.system('/usr/bin/nsupdate -k %s /etc/yunohost/dyndns/zone' % key) == 0:
             logger.success(m18n.n('dyndns_ip_updated'))
             with open('/etc/yunohost/dyndns/old_ip', 'w') as f:
                 f.write(ipv4)