diff --git a/homeassistant/components/blueprint/models.py b/homeassistant/components/blueprint/models.py
index 7547a701220..ee81a583391 100644
--- a/homeassistant/components/blueprint/models.py
+++ b/homeassistant/components/blueprint/models.py
@@ -51,7 +51,7 @@ class Blueprint:
 
     def __init__(
         self,
-        data: dict,
+        data: dict[str, Any],
         *,
         path: str | None = None,
         expected_domain: str | None = None,
diff --git a/homeassistant/components/blueprint/websocket_api.py b/homeassistant/components/blueprint/websocket_api.py
index 0b84d1d08c2..a9bcf5ded1c 100644
--- a/homeassistant/components/blueprint/websocket_api.py
+++ b/homeassistant/components/blueprint/websocket_api.py
@@ -1,6 +1,8 @@
 """Websocket API for blueprint."""
 from __future__ import annotations
 
+from typing import Any, cast
+
 import async_timeout
 import voluptuous as vol
 
@@ -31,12 +33,14 @@ def async_setup(hass: HomeAssistant):
     }
 )
 @websocket_api.async_response
-async def ws_list_blueprints(hass, connection, msg):
+async def ws_list_blueprints(
+    hass: HomeAssistant,
+    connection: websocket_api.ActiveConnection,
+    msg: dict[str, Any],
+) -> None:
     """List available blueprints."""
-    domain_blueprints: dict[str, models.DomainBlueprints] | None = hass.data.get(
-        DOMAIN, {}
-    )
-    results = {}
+    domain_blueprints: dict[str, models.DomainBlueprints] = hass.data.get(DOMAIN, {})
+    results: dict[str, Any] = {}
 
     if msg["domain"] not in domain_blueprints:
         connection.send_result(msg["id"], results)
@@ -62,7 +66,11 @@ async def ws_list_blueprints(hass, connection, msg):
     }
 )
 @websocket_api.async_response
-async def ws_import_blueprint(hass, connection, msg):
+async def ws_import_blueprint(
+    hass: HomeAssistant,
+    connection: websocket_api.ActiveConnection,
+    msg: dict[str, Any],
+) -> None:
     """Import a blueprint."""
     async with async_timeout.timeout(10):
         imported_blueprint = await importer.fetch_blueprint_from_url(hass, msg["url"])
@@ -96,15 +104,17 @@ async def ws_import_blueprint(hass, connection, msg):
     }
 )
 @websocket_api.async_response
-async def ws_save_blueprint(hass, connection, msg):
+async def ws_save_blueprint(
+    hass: HomeAssistant,
+    connection: websocket_api.ActiveConnection,
+    msg: dict[str, Any],
+) -> None:
     """Save a blueprint."""
 
     path = msg["path"]
     domain = msg["domain"]
 
-    domain_blueprints: dict[str, models.DomainBlueprints] | None = hass.data.get(
-        DOMAIN, {}
-    )
+    domain_blueprints: dict[str, models.DomainBlueprints] = hass.data.get(DOMAIN, {})
 
     if domain not in domain_blueprints:
         connection.send_error(
@@ -112,9 +122,8 @@ async def ws_save_blueprint(hass, connection, msg):
         )
 
     try:
-        blueprint = models.Blueprint(
-            yaml.parse_yaml(msg["yaml"]), expected_domain=domain
-        )
+        yaml_data = cast(dict[str, Any], yaml.parse_yaml(msg["yaml"]))
+        blueprint = models.Blueprint(yaml_data, expected_domain=domain)
         if "source_url" in msg:
             blueprint.update_metadata(source_url=msg["source_url"])
     except HomeAssistantError as err:
@@ -143,15 +152,17 @@ async def ws_save_blueprint(hass, connection, msg):
     }
 )
 @websocket_api.async_response
-async def ws_delete_blueprint(hass, connection, msg):
+async def ws_delete_blueprint(
+    hass: HomeAssistant,
+    connection: websocket_api.ActiveConnection,
+    msg: dict[str, Any],
+) -> None:
     """Delete a blueprint."""
 
     path = msg["path"]
     domain = msg["domain"]
 
-    domain_blueprints: dict[str, models.DomainBlueprints] | None = hass.data.get(
-        DOMAIN, {}
-    )
+    domain_blueprints: dict[str, models.DomainBlueprints] = hass.data.get(DOMAIN, {})
 
     if domain not in domain_blueprints:
         connection.send_error(