diff --git a/plinth/modules/config/views.py b/plinth/modules/config/views.py
index a88a6cde2..d39eacf9c 100644
--- a/plinth/modules/config/views.py
+++ b/plinth/modules/config/views.py
@@ -117,9 +117,6 @@ def set_domainname(domainname, old_domainname):
     """Sets machine domain name to domainname"""
     old_domainname = config.get_domainname()
 
-    # Domain name should be ASCII. If it's unicode, convert to ASCII.
-    domainname = str(domainname)
-
     # Domain name is not case sensitive, but Let's Encrypt certificate
     # paths use lower-case domain name.
     domainname = domainname.lower()
diff --git a/plinth/modules/dynamicdns/views.py b/plinth/modules/dynamicdns/views.py
index da6aa7ecf..99cdf5bfa 100644
--- a/plinth/modules/dynamicdns/views.py
+++ b/plinth/modules/dynamicdns/views.py
@@ -129,13 +129,9 @@ def _apply_changes(request, old_status, new_status):
         if new_status.get('use_ipv6'):
             use_ipv6 = "enabled"
 
-        # Domain name should be ASCII. If it's unicode, convert to
-        # ASCII.
-        new_domain_name = str(new_status['dynamicdns_domain'])
-
         # Domain name is not case sensitive, but Let's Encrypt
         # certificate paths use lower-case domain name.
-        new_domain_name = new_domain_name.lower()
+        new_domain_name = new_status['dynamicdns_domain'].lower()
 
         _run([
             'configure',
diff --git a/plinth/modules/pagekite/forms.py b/plinth/modules/pagekite/forms.py
index e95ca3b42..336530eed 100644
--- a/plinth/modules/pagekite/forms.py
+++ b/plinth/modules/pagekite/forms.py
@@ -67,12 +67,8 @@ class ConfigurationForm(forms.Form):
         old = _filter(self.initial)
         new = _filter(self.cleaned_data)
 
-        # Kite name should be ASCII. If it's unicode, convert to
-        # ASCII.
-        kite_name = str(new['kite_name'])
-
         # Let's Encrypt certificate paths use lower-case kite name.
-        kite_name = kite_name.lower()
+        kite_name = new['kite_name'].lower()
 
         if old != new:
             frontend = f"{new['server_domain']}:{new['server_port']}"