diff --git a/bitwarden-to-keepass.py b/bitwarden-to-keepass.py
index ba5199a..bd1bdc9 100644
--- a/bitwarden-to-keepass.py
+++ b/bitwarden-to-keepass.py
@@ -13,7 +13,7 @@ from pykeepass.group import Group as KPGroup
 from pykeepass.entry import Entry as KPEntry
 
 import folder as FolderType
-from item import Item, Types as ItemTypes
+from item import Item, ItemType, CustomFieldType
 
 logging.basicConfig(
     level=logging.INFO,
@@ -43,7 +43,7 @@ def bitwarden_to_keepass(args):
     items = json.loads(items)
     logging.info(f'Starting to process {len(items)} items.')
     for item in items:
-        if item['type'] in [ItemTypes.CARD, ItemTypes.IDENTITY]:
+        if item['type'] in [ItemType.CARD, ItemType.IDENTITY]:
             logging.warning(f'Skipping credit card or identity item "{item["name"]}".')
             continue
 
@@ -70,14 +70,18 @@ def bitwarden_to_keepass(args):
 
             totp_secret, totp_settings = bw_item.get_totp()
             if totp_secret and totp_settings:
-                entry.set_custom_property('TOTP Seed', totp_secret)
+                entry.set_custom_property('TOTP Seed', totp_secret, protect=True)
                 entry.set_custom_property('TOTP Settings', totp_settings)
 
             uris = [uri['uri'] for uri in bw_item.get_uris()]
             set_kp_entry_urls(entry, uris)
 
             for field in bw_item.get_custom_fields():
-                entry.set_custom_property(field['name'], field['value'])
+                entry.set_custom_property(
+                    field['name'],
+                    field['value'],
+                    protect=field['type'] == CustomFieldType.HIDDEN,
+                )
 
             for attachment in bw_item.get_attachments():
                 attachment_raw = subprocess.check_output([
diff --git a/item.py b/item.py
index 1393212..1a24f65 100644
--- a/item.py
+++ b/item.py
@@ -2,12 +2,16 @@ from enum import IntEnum
 from urllib.parse import urlsplit, parse_qsl
 
 
-class Types(IntEnum):
+class ItemType(IntEnum):
     LOGIN = 1
     SECURE_NOTE = 2
     CARD = 3
     IDENTITY = 4
 
+class CustomFieldType(IntEnum):
+    TEXT = 0
+    HIDDEN = 1
+    BOOLEAN = 2
 
 class Item:
     def __init__(self, item):
@@ -53,6 +57,7 @@ class Item:
         for field in self.item['fields']:
             field['name'] = field['name'] if field['name'] is not None else ''
             field['value'] = field['value'] if field['value'] is not None else ''
+            field['type'] = CustomFieldType(field['type'])
 
         return self.item['fields']