diff --git a/modoboa/core/app_settings.py b/modoboa/core/app_settings.py
index 4d21f3904..5dcfda54d 100644
--- a/modoboa/core/app_settings.py
+++ b/modoboa/core/app_settings.py
@@ -71,7 +71,8 @@ class GeneralParametersForm(parameters.AdminParametersForm):
     secret_key = forms.CharField(
         label=ugettext_lazy("Secret key"),
         initial=random_key(),
-        help_text=ugettext_lazy("Key used to encrypt/decrypt passwords")
+        help_text=ugettext_lazy("Key used to encrypt/decrypt passwords"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     # LDAP specific settings
@@ -80,7 +81,8 @@ class GeneralParametersForm(parameters.AdminParametersForm):
     ldap_server_address = forms.CharField(
         label=ugettext_lazy("Server address"),
         initial="localhost",
-        help_text=ugettext_lazy("The IP address of the DNS name of the LDAP server")
+        help_text=ugettext_lazy("The IP address of the DNS name of the LDAP server"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     ldap_server_port = forms.IntegerField(
@@ -109,14 +111,15 @@ class GeneralParametersForm(parameters.AdminParametersForm):
         label=ugettext_lazy("Bind DN"),
         initial='',
         help_text=ugettext_lazy("The distinguished name to use when binding to the LDAP server. Leave empty for an anonymous bind"),
-        required=False
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     ldap_bind_password = forms.CharField(
         label=ugettext_lazy("Bind password"),
         initial='',
         help_text=ugettext_lazy("The password to use when binding to the LDAP server (with 'Bind DN')"),
-        widget=forms.PasswordInput(render_value=True),
+        widget=forms.PasswordInput(attrs={"class": "form-control"}, render_value=True),
         required=False
     )
 
@@ -124,27 +127,31 @@ class GeneralParametersForm(parameters.AdminParametersForm):
         label=ugettext_lazy("Users search base"),
         initial="",
         help_text=ugettext_lazy("The distinguished name of the search base used to find users"),
-        required=False
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     ldap_search_filter = forms.CharField(
         label=ugettext_lazy("Search filter"),
         initial="(mail=%(user)s)",
         help_text=ugettext_lazy("An optional filter string (e.g. '(objectClass=person)'). In order to be valid, it must be enclosed in parentheses."),
-        required=False
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     ldap_user_dn_template = forms.CharField(
         label=ugettext_lazy("User DN template"),
         initial="",
         help_text=ugettext_lazy("The template used to construct a user's DN. It should contain one placeholder (ie. %(user)s)"),
-        required=False
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     ldap_password_attribute = forms.CharField(
         label=ugettext_lazy("Password attribute"),
         initial="userPassword",
-        help_text=ugettext_lazy("The attribute used to store user passwords")
+        help_text=ugettext_lazy("The attribute used to store user passwords"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     ldap_is_active_directory = YesNoField(
@@ -160,7 +167,8 @@ class GeneralParametersForm(parameters.AdminParametersForm):
             "Members of those LDAP Posix groups will be created as domain "
             "administrators. Use ';' characters to separate groups."
         ),
-        required=False
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     ldap_groups_search_base = forms.CharField(
@@ -169,7 +177,8 @@ class GeneralParametersForm(parameters.AdminParametersForm):
         help_text=ugettext_lazy(
             "The distinguished name of the search base used to find groups"
         ),
-        required=False
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     sep3 = SeparatorField(label=ugettext_lazy("Miscellaneous"))
diff --git a/modoboa/extensions/admin/app_settings.py b/modoboa/extensions/admin/app_settings.py
index 1eb4ba3d0..00092d989 100644
--- a/modoboa/extensions/admin/app_settings.py
+++ b/modoboa/extensions/admin/app_settings.py
@@ -21,7 +21,8 @@ class AdminParametersForm(parameters.AdminParametersForm):
     mailboxes_owner = forms.CharField(
         label=ugettext_lazy("Mailboxes ower"),
         initial="vmail",
-        help_text=ugettext_lazy("The UNIX account who owns mailboxes on the filesystem")
+        help_text=ugettext_lazy("The UNIX account who owns mailboxes on the filesystem"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     default_domain_quota = forms.IntegerField(
diff --git a/modoboa/extensions/admin/forms/account.py b/modoboa/extensions/admin/forms/account.py
index e125a3ccd..04d53a5ee 100644
--- a/modoboa/extensions/admin/forms/account.py
+++ b/modoboa/extensions/admin/forms/account.py
@@ -20,7 +20,8 @@ class AccountFormGeneral(forms.ModelForm):
         help_text=ugettext_lazy(
             "The user's name. Must be a valid e-mail address for simple users "
             "or administrators with a mailbox."
-        )
+        ),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
     role = forms.ChoiceField(
         label=ugettext_lazy("Role"),
@@ -29,11 +30,12 @@ class AccountFormGeneral(forms.ModelForm):
         widget=forms.Select(attrs={"class": "form-control"})
     )
     password1 = forms.CharField(
-        label=ugettext_lazy("Password"), widget=forms.PasswordInput
+        label=ugettext_lazy("Password"),
+        widget=forms.PasswordInput(attrs={"class": "form-control"})
     )
     password2 = forms.CharField(
         label=ugettext_lazy("Confirmation"),
-        widget=forms.PasswordInput,
+        widget=forms.PasswordInput(attrs={"class": "form-control"}),
         help_text=ugettext_lazy("Enter the same password as above, for verification.")
     )
 
@@ -50,7 +52,8 @@ class AccountFormGeneral(forms.ModelForm):
         if user.group == "DomainAdmins":
             self.fields["role"] = forms.CharField(
                 label="",
-                widget=forms.HiddenInput, required=False
+                widget=forms.HiddenInput(attrs={"class": "form-control"}),
+                required=False
             )
         else:
             self.fields["role"].choices = [('', ugettext_lazy("Choose"))]
diff --git a/modoboa/extensions/admin/forms/domain.py b/modoboa/extensions/admin/forms/domain.py
index afd3ee19f..5e551b3c3 100644
--- a/modoboa/extensions/admin/forms/domain.py
+++ b/modoboa/extensions/admin/forms/domain.py
@@ -190,7 +190,7 @@ class DomainFormOptions(forms.Form):
             "The administrator's name. Don't include the domain's name here, "
             "it will be automatically appended."
         ),
-        widget=forms.widgets.TextInput(attrs={"class": "input-small"}),
+        widget=forms.widgets.TextInput(attrs={"class": "form-control input-small"}),
         required=False
     )
 
diff --git a/modoboa/extensions/admin/forms/export.py b/modoboa/extensions/admin/forms/export.py
index 7727c5160..f3870b0e8 100644
--- a/modoboa/extensions/admin/forms/export.py
+++ b/modoboa/extensions/admin/forms/export.py
@@ -4,10 +4,16 @@ from django.utils.translation import ugettext_lazy
 
 class ExportDataForm(forms.Form):
     filename = forms.CharField(
-        label=ugettext_lazy("File name"), max_length=100, required=False
+        label=ugettext_lazy("File name"),
+        max_length=100,
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
     sepchar = forms.CharField(
-        label=ugettext_lazy("Separator"), max_length=1, required=False
+        label=ugettext_lazy("Separator"),
+        max_length=1,
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     def __init__(self, *args, **kwargs):
diff --git a/modoboa/extensions/admin/forms/import_.py b/modoboa/extensions/admin/forms/import_.py
index fc6ccebe3..0cd4ce237 100644
--- a/modoboa/extensions/admin/forms/import_.py
+++ b/modoboa/extensions/admin/forms/import_.py
@@ -5,7 +5,10 @@ from django.utils.translation import ugettext_lazy
 class ImportDataForm(forms.Form):
     sourcefile = forms.FileField(label=ugettext_lazy("Select a file"))
     sepchar = forms.CharField(
-        label=ugettext_lazy("Separator"), max_length=1, required=False
+        label=ugettext_lazy("Separator"),
+        max_length=1,
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
     continue_if_exists = forms.BooleanField(
         label=ugettext_lazy("Continue on error"), required=False,
diff --git a/modoboa/extensions/amavis/app_settings.py b/modoboa/extensions/amavis/app_settings.py
index 41a9cd3be..d1feef65d 100644
--- a/modoboa/extensions/amavis/app_settings.py
+++ b/modoboa/extensions/amavis/app_settings.py
@@ -36,7 +36,8 @@ class ParametersForm(AdminParametersForm):
     am_pdp_host = forms.CharField(
         label=_("PDP server address"),
         initial="localhost",
-        help_text=_("PDP server address (if inet mode)")
+        help_text=_("PDP server address (if inet mode)"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     am_pdp_port = forms.IntegerField(
@@ -49,7 +50,8 @@ class ParametersForm(AdminParametersForm):
     am_pdp_socket = forms.CharField(
         label=_("PDP server socket"),
         initial="/var/amavis/amavisd.sock",
-        help_text=_("Path to the PDP server socket (if unix mode)")
+        help_text=_("Path to the PDP server socket (if unix mode)"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
     
     check_requests_interval = forms.IntegerField(
diff --git a/modoboa/extensions/postfix_autoreply/app_settings.py b/modoboa/extensions/postfix_autoreply/app_settings.py
index b693ad1b6..b5d74d99c 100644
--- a/modoboa/extensions/postfix_autoreply/app_settings.py
+++ b/modoboa/extensions/postfix_autoreply/app_settings.py
@@ -22,7 +22,8 @@ class ParametersForm(AdminParametersForm):
         initial=ugettext_lazy("I'm off"),
         help_text=ugettext_lazy(
             "Default subject used when an auto-reply message is created automatically"
-        )
+        ),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     default_content = forms.CharField(
@@ -38,7 +39,7 @@ Best regards,
             "automatically. The '%(name)s' macro will be replaced by the "
             "user's full name."
         ),
-        widget=forms.widgets.Textarea
+        widget=forms.widgets.Textarea(attrs={"class": "form-control"})
     )
 
     def clean_default_content(self):
diff --git a/modoboa/extensions/postfix_relay_domains/app_settings.py b/modoboa/extensions/postfix_relay_domains/app_settings.py
index 49d17ae0c..2ce3ab88f 100644
--- a/modoboa/extensions/postfix_relay_domains/app_settings.py
+++ b/modoboa/extensions/postfix_relay_domains/app_settings.py
@@ -9,5 +9,6 @@ class AdminParametersForm(parameters.AdminParametersForm):
     master_cf_path = forms.CharField(
         label=ugettext_lazy("Postfix's master.cf path"),
         initial="/etc/postfix/master.cf",
-        help_text=ugettext_lazy('Path to the master.cf configuration file')
+        help_text=ugettext_lazy('Path to the master.cf configuration file'),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
diff --git a/modoboa/extensions/sievefilters/app_settings.py b/modoboa/extensions/sievefilters/app_settings.py
index 5680be96c..0d6547559 100644
--- a/modoboa/extensions/sievefilters/app_settings.py
+++ b/modoboa/extensions/sievefilters/app_settings.py
@@ -21,7 +21,8 @@ class ParametersForm(AdminParametersForm):
     server = forms.CharField(
         label=_("Server address"),
         initial="127.0.0.1",
-        help_text=_("Address of your MANAGESIEVE server")
+        help_text=_("Address of your MANAGESIEVE server"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     port = forms.IntegerField(
diff --git a/modoboa/extensions/sievefilters/forms.py b/modoboa/extensions/sievefilters/forms.py
index a3fd804c5..8f0f04443 100644
--- a/modoboa/extensions/sievefilters/forms.py
+++ b/modoboa/extensions/sievefilters/forms.py
@@ -9,7 +9,7 @@ from modoboa.extensions.admin.templatetags.admin_tags import gender
 
 
 class FiltersSetForm(forms.Form):
-    name = forms.CharField()
+    name = forms.CharField(widget=forms.TextInput(attrs={"class": "form-control"}))
     active = forms.BooleanField(
         label=gender("Active", "m"), required=False,
         initial=False,
@@ -57,7 +57,7 @@ class FilterForm(forms.Form):
     def __init__(self, conditions, actions, request, *args, **kwargs):
         super(FilterForm, self).__init__(*args, **kwargs)
 
-        self.fields["name"] = forms.CharField(label=_("Name"))
+        self.fields["name"] = forms.CharField(label=_("Name"), widget=forms.TextInput(attrs={"class": "form-control"}))
         self.fields["match_type"] = forms.ChoiceField(
             choices=[("allof", _("All of the following")),
                      ("anyof", _("Any of the following")),
@@ -117,7 +117,7 @@ class FilterForm(forms.Form):
                 if op != opdef[0]:
                     continue
                 if opdef[2] in ["string", "number"]:
-                    vfield = forms.CharField(max_length=255, initial=value)
+                    vfield = forms.CharField(max_length=255, initial=value, widget=forms.TextInput(attrs={"class": "form-control"}))
 
         self.fields["cond_target_%d" % self.conds_cnt] = \
             forms.ChoiceField(initial=name, choices=targets)
@@ -154,7 +154,7 @@ class FilterForm(forms.Form):
             arg = args[cnt]
             aname = "action_arg_%d_%d" % (self.actions_cnt, cnt)
             if arg["type"] == "string":
-                self.fields[aname] = forms.CharField(max_length=255, initial=value)
+                self.fields[aname] = forms.CharField(max_length=255, initial=value, widget=forms.TextInput(attrs={"class": "form-control"}))
             elif arg["type"] == "list":
                 choices = getattr(self, arg["vloader"])(request)
                 self.fields[aname] = forms.ChoiceField(initial=value, choices=choices)
diff --git a/modoboa/extensions/stats/app_settings.py b/modoboa/extensions/stats/app_settings.py
index 86e0a749a..84afb8f3b 100644
--- a/modoboa/extensions/stats/app_settings.py
+++ b/modoboa/extensions/stats/app_settings.py
@@ -13,11 +13,13 @@ class ParametersForm(AdminParametersForm):
     logfile = forms.CharField(
         label=ugettext_lazy("Path to the log file"),
         initial="/var/log/mail.log",
-        help_text=ugettext_lazy("Path to log file used to collect statistics")
+        help_text=ugettext_lazy("Path to log file used to collect statistics"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     rrd_rootdir = forms.CharField(
         label=ugettext_lazy("Directory to store RRD files"),
         initial="/tmp/modoboa",
-        help_text=ugettext_lazy("Path to directory where RRD files are stored")
+        help_text=ugettext_lazy("Path to directory where RRD files are stored"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
diff --git a/modoboa/extensions/webmail/app_settings.py b/modoboa/extensions/webmail/app_settings.py
index 7b6bdbd9b..458c91ea9 100644
--- a/modoboa/extensions/webmail/app_settings.py
+++ b/modoboa/extensions/webmail/app_settings.py
@@ -13,7 +13,8 @@ class ParametersForm(AdminParametersForm):
     max_attachment_size = forms.CharField(
         label=_("Maximum attachment size"),
         initial="2048",
-        help_text=_("Maximum attachment size in bytes (or KB, MB, GB if specified)")
+        help_text=_("Maximum attachment size in bytes (or KB, MB, GB if specified)"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     sep1 = SeparatorField(label=_("IMAP settings"))
@@ -21,7 +22,8 @@ class ParametersForm(AdminParametersForm):
     imap_server = forms.CharField(
         label=_("Server address"),
         initial="127.0.0.1",
-        help_text=_("Address of your IMAP server")
+        help_text=_("Address of your IMAP server"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     imap_secured = YesNoField(
@@ -42,7 +44,8 @@ class ParametersForm(AdminParametersForm):
     smtp_server = forms.CharField(
         label=_("Server address"),
         initial="127.0.0.1",
-        help_text=_("Address of your SMTP server")
+        help_text=_("Address of your SMTP server"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     smtp_secured_mode = forms.ChoiceField(
@@ -114,19 +117,22 @@ class UserSettings(UserParametersForm):
     trash_folder = forms.CharField(
         initial="Trash",
         label=_("Trash folder"),
-        help_text=_("Folder where deleted messages go")
+        help_text=_("Folder where deleted messages go"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     sent_folder = forms.CharField(
         initial="Sent",
         label=_("Sent folder"),
-        help_text=_("Folder where copies of sent messages go")
+        help_text=_("Folder where copies of sent messages go"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     drafts_folder = forms.CharField(
         initial="Drafts",
         label=_("Drafts folder"),
-        help_text=_("Folder where drafts go")
+        help_text=_("Folder where drafts go"),
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
 
     sep3 = SeparatorField(label=_("Composing messages"))
@@ -143,7 +149,7 @@ class UserSettings(UserParametersForm):
         initial="",
         label=_("Signature text"),
         help_text=_("User defined email signature"),
-        widget=forms.widgets.Textarea,
+        widget=forms.widgets.Textarea(attrs={"class": "form-control"}),
         required=False
     )
 
diff --git a/modoboa/extensions/webmail/forms.py b/modoboa/extensions/webmail/forms.py
index d543e2971..15eaa5a00 100644
--- a/modoboa/extensions/webmail/forms.py
+++ b/modoboa/extensions/webmail/forms.py
@@ -79,16 +79,21 @@ def make_body_images_inline(body):
 class ComposeMailForm(forms.Form):
     """Compose mail form.
     """
-    to = forms.CharField(label=_("To"))
-    cc = forms.CharField(label=_("Cc"), required=False)
-    cci = forms.CharField(label=_("Cci"), required=False)
+    to = forms.CharField(label=_("To"), widget=forms.TextInput(attrs={"class": "form-control"}))
+    cc = forms.CharField(label=_("Cc"), required=False, widget=forms.TextInput(attrs={"class": "form-control"}))
+    cci = forms.CharField(label=_("Cci"), required=False, widget=forms.TextInput(attrs={"class": "form-control"}))
     subject = forms.CharField(
-        label=_("Subject"), max_length=255, required=False
+        label=_("Subject"),
+        max_length=255,
+        required=False,
+        widget=forms.TextInput(attrs={"class": "form-control"})
     )
     origmsgid = forms.CharField(
-        label="", widget=forms.HiddenInput(), required=False
+        label="",
+        widget=forms.HiddenInput(attrs={"class": "form-control"}),
+        required=False
     )
-    body = forms.CharField(widget=forms.widgets.Textarea)
+    body = forms.CharField(widget=forms.widgets.Textarea(attrs={"class": "form-control"}))
 
     def _html_msg(self):
         """Create a multipart message.
@@ -189,9 +194,11 @@ class ForwardMailForm(ComposeMailForm):
 
 class FolderForm(forms.Form):
     oldname = forms.CharField(
-        label="", widget=forms.HiddenInput(), required=False
+        label="",
+        widget=forms.HiddenInput(attrs={"class": "form-control"}),
+        required=False
     )
-    name = forms.CharField()
+    name = forms.CharField(widget=forms.TextInput(attrs={"class": "form-control"}))
 
 
 class AttachmentForm(forms.Form):