diff --git a/slixfeed/__main__.py b/slixfeed/__main__.py
index c00e51c..5982de0 100644
--- a/slixfeed/__main__.py
+++ b/slixfeed/__main__.py
@@ -127,6 +127,7 @@ class JabberClient:
     def __init__(self, jid, password, hostname=None, port=None, alias=None):
         xmpp = Slixfeed(jid, password, hostname, port, alias)
         xmpp.register_plugin('xep_0004') # Data Forms
+        xmpp.register_plugin('xep_0122') # Data Forms Validation
         xmpp.register_plugin('xep_0030') # Service Discovery
         xmpp.register_plugin('xep_0045') # Multi-User Chat
         xmpp.register_plugin('xep_0048') # Bookmarks
diff --git a/slixfeed/xmpp/client.py b/slixfeed/xmpp/client.py
index e6e1e93..a9d65a7 100644
--- a/slixfeed/xmpp/client.py
+++ b/slixfeed/xmpp/client.py
@@ -1018,6 +1018,8 @@ class Slixfeed(slixmpp.ClientXMPP):
                                  label='Archive',
                                  desc='Number of news items to archive.',
                                  value=value)
+        options['validate']['datatype'] = 'xs:integer'
+        options['validate']['range'] = { 'minimum': 0, 'maximum': 500 }
         i = 0
         while i <= 500:
             x = str(i)
@@ -1031,6 +1033,8 @@ class Slixfeed(slixmpp.ClientXMPP):
                                  label='Amount',
                                  desc='Set amount of items per update.',
                                  value=value)
+        options['validate']['datatype'] = 'xs:integer'
+        options['validate']['range'] = { 'minimum': 1, 'maximum': 5 }
         i = 1
         while i <= 5:
             x = str(i)