diff --git a/homeassistant/components/opengarage/entity.py b/homeassistant/components/opengarage/entity.py
index 539c75c29b3d..4a2b19566159 100644
--- a/homeassistant/components/opengarage/entity.py
+++ b/homeassistant/components/opengarage/entity.py
@@ -52,5 +52,5 @@ class OpenGarageEntity(CoordinatorEntity[OpenGarageDataUpdateCoordinator]):
             manufacturer="Open Garage",
             name=self.coordinator.data["name"],
             suggested_area="Garage",
-            sw_version=self.coordinator.data["fwv"],
+            sw_version=str(self.coordinator.data["fwv"]),
         )
diff --git a/tests/components/opengarage/conftest.py b/tests/components/opengarage/conftest.py
index e486e522c3f9..bea129a75c0d 100644
--- a/tests/components/opengarage/conftest.py
+++ b/tests/components/opengarage/conftest.py
@@ -40,7 +40,7 @@ def mock_opengarage() -> Generator[MagicMock]:
         client.update_state.return_value = {
             "name": "abcdef",
             "mac": "aa:bb:cc:dd:ee:ff",
-            "fwv": "1.2.0",
+            "fwv": 120,
         }
         yield client
 
diff --git a/tests/components/opengarage/test_button.py b/tests/components/opengarage/test_button.py
index f85b74e2faa9..61b61e17c4e8 100644
--- a/tests/components/opengarage/test_button.py
+++ b/tests/components/opengarage/test_button.py
@@ -1,7 +1,10 @@
 """Test the OpenGarage Browser buttons."""
 
+import logging
 from unittest.mock import MagicMock
 
+import pytest
+
 from homeassistant.components import button
 from homeassistant.const import ATTR_ENTITY_ID
 from homeassistant.core import HomeAssistant
@@ -32,3 +35,24 @@ async def test_buttons(
     assert entry.device_id
     device_entry = device_registry.async_get(entry.device_id)
     assert device_entry
+
+
+async def test_device_info_sw_version_is_string(
+    hass: HomeAssistant,
+    mock_opengarage: MagicMock,
+    mock_config_entry: MockConfigEntry,
+    device_registry: dr.DeviceRegistry,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test that sw_version is a string even when API returns int."""
+    mock_config_entry.add_to_hass(hass)
+    with caplog.at_level(logging.WARNING, logger="homeassistant.helpers.frame"):
+        await hass.config_entries.async_setup(mock_config_entry.entry_id)
+        await hass.async_block_till_done()
+
+    device_entry = device_registry.async_get_device(
+        connections={(dr.CONNECTION_NETWORK_MAC, "aa:bb:cc:dd:ee:ff")}
+    )
+    assert device_entry
+    assert device_entry.sw_version == "120"
+    assert "non-string value" not in caplog.text