diff --git a/vc_vidyo/indico_vc_vidyo/forms.py b/vc_vidyo/indico_vc_vidyo/forms.py
index 1f85fdd..95f5cb5 100644
--- a/vc_vidyo/indico_vc_vidyo/forms.py
+++ b/vc_vidyo/indico_vc_vidyo/forms.py
@@ -20,12 +20,13 @@ import re
 
 from wtforms.fields.core import BooleanField
 from wtforms.fields.simple import TextAreaField
-from wtforms.validators import DataRequired, Length, Regexp, Optional, ValidationError
+from wtforms.validators import DataRequired, Length, Optional, ValidationError
 
 from indico.modules.vc.forms import VCRoomFormBase, VCRoomAttachFormBase
 from indico.util.user import retrieve_principal
 from indico.web.forms.base import generated_data
 from indico.web.forms.fields import PrincipalField, IndicoPasswordField
+from indico.web.forms.validators import IndicoRegexp
 from indico.web.forms.widgets import SwitchWidget
 
 from indico_vc_vidyo import _
@@ -61,10 +62,10 @@ class VCRoomForm(VCRoomFormBase, VidyoAdvancedFormMixin):
     description = TextAreaField(_('Description'), [DataRequired()], description=_('The description of the room'))
     owner_user = PrincipalField(_('Owner'), [DataRequired()], description=_('The owner of the room'))
     moderation_pin = IndicoPasswordField(_('Moderation PIN'),
-                                         [Optional(), Length(min=3, max=10), Regexp(PIN_RE)],
+                                         [Optional(), Length(min=3, max=10), IndicoRegexp(PIN_RE)],
                                          toggle=True, description=_('Used to moderate the VC Room'))
     room_pin = IndicoPasswordField(
-        _('Room PIN'), [Optional(), Length(min=3, max=10), Regexp(PIN_RE, message=ERROR_MSG_PIN)],
+        _('Room PIN'), [Optional(), Length(min=3, max=10), IndicoRegexp(PIN_RE, message=ERROR_MSG_PIN)],
         toggle=True, description=_('Used to protect the access to the VC Room (leave blank for open access)'))
     auto_mute = BooleanField(_('Auto mute'),
                              widget=SwitchWidget(_('On'), _('Off')),