diff --git a/modoboa/core/app_settings.py b/modoboa/core/app_settings.py
index 3b3a77df6..9b8f516ab 100644
--- a/modoboa/core/app_settings.py
+++ b/modoboa/core/app_settings.py
@@ -41,7 +41,7 @@ class GeneralParametersForm(parameters.AdminParametersForm):
                  ('ldap', "LDAP")],
         initial="local",
         help_text=ugettext_lazy("The backend used for authentication"),
-        widget=InlineRadioSelect
+        widget=InlineRadioSelect(attrs={"class": "form-control"})
     )
 
     password_scheme = forms.ChoiceField(
@@ -99,7 +99,7 @@ class GeneralParametersForm(parameters.AdminParametersForm):
                  ('directbind', ugettext_lazy("Direct bind"))],
         initial='searchbind',
         help_text=ugettext_lazy("Choose the authentication method to use"),
-        widget=InlineRadioSelect
+        widget=InlineRadioSelect(attrs={"class": "form-control"})
     )
 
     ldap_bind_dn = forms.CharField(
diff --git a/modoboa/core/forms.py b/modoboa/core/forms.py
index 2cf98f1f3..6d968f13d 100644
--- a/modoboa/core/forms.py
+++ b/modoboa/core/forms.py
@@ -23,15 +23,15 @@ class LoginForm(forms.Form):
 class ProfileForm(forms.ModelForm):
     oldpassword = forms.CharField(
         label=ugettext_lazy("Old password"), required=False,
-        widget=forms.PasswordInput
+        widget=forms.PasswordInput(attrs={"class": "form-control"})
     )
     newpassword = forms.CharField(
         label=ugettext_lazy("New password"), required=False,
-        widget=forms.PasswordInput
+        widget=forms.PasswordInput(attrs={"class": "form-control"})
     )
     confirmation = forms.CharField(
         label=ugettext_lazy("Confirmation"), required=False,
-        widget=forms.PasswordInput
+        widget=forms.PasswordInput(attrs={"class": "form-control"})
     )
 
     class Meta: