diff --git a/homeassistant/components/tedee/entity.py b/homeassistant/components/tedee/entity.py
index 3e0ac5468e9..fa80ffcb24c 100644
--- a/homeassistant/components/tedee/entity.py
+++ b/homeassistant/components/tedee/entity.py
@@ -29,7 +29,7 @@ class TedeeEntity(CoordinatorEntity[TedeeApiCoordinator]):
         self._attr_device_info = DeviceInfo(
             identifiers={(DOMAIN, str(lock.lock_id))},
             name=lock.lock_name,
-            manufacturer="tedee",
+            manufacturer="Tedee",
             model=lock.lock_type,
         )
 
diff --git a/tests/components/tedee/snapshots/test_lock.ambr b/tests/components/tedee/snapshots/test_lock.ambr
index ad89e9c842d..b7c20f39750 100644
--- a/tests/components/tedee/snapshots/test_lock.ambr
+++ b/tests/components/tedee/snapshots/test_lock.ambr
@@ -61,7 +61,7 @@
       ),
     }),
     'is_new': False,
-    'manufacturer': 'tedee',
+    'manufacturer': 'Tedee',
     'model': 'Tedee PRO',
     'name': 'Lock-1A2B',
     'name_by_user': None,
@@ -133,7 +133,7 @@
       ),
     }),
     'is_new': False,
-    'manufacturer': 'tedee',
+    'manufacturer': 'Tedee',
     'model': 'Tedee GO',
     'name': 'Lock-2C3D',
     'name_by_user': None,