diff --git a/homeassistant/components/nina/const.py b/homeassistant/components/nina/const.py
index 758299bbd10..76881501894 100644
--- a/homeassistant/components/nina/const.py
+++ b/homeassistant/components/nina/const.py
@@ -15,14 +15,14 @@ CONF_REGIONS: str = "regions"
 CONF_MESSAGE_SLOTS: str = "slots"
 CONF_FILTER_CORONA: str = "corona_filter"
 
-ATTR_HEADLINE: str = "Headline"
-ATTR_DESCRIPTION: str = "Description"
-ATTR_SENDER: str = "Sender"
-ATTR_SEVERITY: str = "Severity"
-ATTR_ID: str = "ID"
-ATTR_SENT: str = "Sent"
-ATTR_START: str = "Start"
-ATTR_EXPIRES: str = "Expires"
+ATTR_HEADLINE: str = "headline"
+ATTR_DESCRIPTION: str = "description"
+ATTR_SENDER: str = "sender"
+ATTR_SEVERITY: str = "severity"
+ATTR_ID: str = "id"
+ATTR_SENT: str = "sent"
+ATTR_START: str = "start"
+ATTR_EXPIRES: str = "expires"
 
 CONST_LIST_A_TO_D: list[str] = ["A", "Ä", "B", "C", "D"]
 CONST_LIST_E_TO_H: list[str] = ["E", "F", "G", "H"]