diff --git a/homeassistant/components/tado/manifest.json b/homeassistant/components/tado/manifest.json
index eba13d469f3..b252a396689 100644
--- a/homeassistant/components/tado/manifest.json
+++ b/homeassistant/components/tado/manifest.json
@@ -14,5 +14,5 @@
   },
   "iot_class": "cloud_polling",
   "loggers": ["PyTado"],
-  "requirements": ["python-tado==0.18.11"]
+  "requirements": ["python-tado==0.18.14"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index fbe5bd68f22..2ff0f9df162 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2491,7 +2491,7 @@ python-snoo==0.6.5
 python-songpal==0.16.2
 
 # homeassistant.components.tado
-python-tado==0.18.11
+python-tado==0.18.14
 
 # homeassistant.components.technove
 python-technove==2.0.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 022214afd9d..12869598f9b 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -2025,7 +2025,7 @@ python-snoo==0.6.5
 python-songpal==0.16.2
 
 # homeassistant.components.tado
-python-tado==0.18.11
+python-tado==0.18.14
 
 # homeassistant.components.technove
 python-technove==2.0.0
diff --git a/tests/components/tado/test_init.py b/tests/components/tado/test_init.py
index 2f2ccacf3c0..10acd8eef59 100644
--- a/tests/components/tado/test_init.py
+++ b/tests/components/tado/test_init.py
@@ -1,7 +1,13 @@
 """Test the Tado integration."""
 
+import asyncio
+import threading
+import time
+from unittest.mock import patch
+
+from PyTado.http import Http
+
 from homeassistant.components.tado import DOMAIN
-from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
 from homeassistant.core import HomeAssistant
 
@@ -24,7 +30,37 @@ async def test_v1_migration(hass: HomeAssistant) -> None:
     await hass.async_block_till_done()
     assert entry.version == 2
     assert CONF_USERNAME not in entry.data
-    assert CONF_PASSWORD not in entry.data
 
-    assert entry.state is ConfigEntryState.SETUP_ERROR
-    assert len(hass.config_entries.flow.async_progress()) == 1
+
+async def test_refresh_token_threading_lock(hass: HomeAssistant) -> None:
+    """Test that threading.Lock in Http._refresh_token serializes concurrent calls."""
+
+    timestamps: list[tuple[str, float]] = []
+    lock = threading.Lock()
+
+    def fake_refresh_token(*args, **kwargs) -> bool:
+        """Simulate the refresh token process with a threading lock."""
+        with lock:
+            timestamps.append(("start", time.monotonic()))
+            time.sleep(0.2)
+            timestamps.append(("end", time.monotonic()))
+            return True
+
+    with (
+        patch("PyTado.http.Http._refresh_token", side_effect=fake_refresh_token),
+        patch("PyTado.http.Http.__init__", return_value=None),
+    ):
+        http_instance = Http()
+
+        # Run two concurrent refresh token calls, should do the trick
+        await asyncio.gather(
+            hass.async_add_executor_job(http_instance._refresh_token),
+            hass.async_add_executor_job(http_instance._refresh_token),
+        )
+
+    end1 = timestamps[1][1]
+    start2 = timestamps[2][1]
+
+    assert start2 >= end1, (
+        f"Second refresh started before first ended: start2={start2}, end1={end1}."
+    )