diff --git a/homeassistant/components/tasmota/manifest.json b/homeassistant/components/tasmota/manifest.json
index 77d7701f6d7..886c49866ed 100644
--- a/homeassistant/components/tasmota/manifest.json
+++ b/homeassistant/components/tasmota/manifest.json
@@ -3,7 +3,7 @@
   "name": "Tasmota",
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/tasmota",
-  "requirements": ["hatasmota==0.1.6"],
+  "requirements": ["hatasmota==0.2.5"],
   "dependencies": ["mqtt"],
   "mqtt": ["tasmota/discovery/#"],
   "codeowners": ["@emontnemery"]
diff --git a/requirements_all.txt b/requirements_all.txt
index ee797a4646e..b4823015d36 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -735,7 +735,7 @@ hass-nabucasa==0.39.0
 hass_splunk==0.1.1
 
 # homeassistant.components.tasmota
-hatasmota==0.1.6
+hatasmota==0.2.5
 
 # homeassistant.components.jewish_calendar
 hdate==0.9.12
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 0624c9441fc..9f3a6ff1f3c 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -376,7 +376,7 @@ hangups==0.4.11
 hass-nabucasa==0.39.0
 
 # homeassistant.components.tasmota
-hatasmota==0.1.6
+hatasmota==0.2.5
 
 # homeassistant.components.jewish_calendar
 hdate==0.9.12
diff --git a/tests/components/tasmota/test_light.py b/tests/components/tasmota/test_light.py
index d04b9dcf02b..c7968df32f2 100644
--- a/tests/components/tasmota/test_light.py
+++ b/tests/components/tasmota/test_light.py
@@ -1059,6 +1059,69 @@ async def test_transition(hass, mqtt_mock, setup_tasmota):
     mqtt_mock.async_publish.reset_mock()
 
 
+async def test_transition_fixed(hass, mqtt_mock, setup_tasmota):
+    """Test transition commands."""
+    config = copy.deepcopy(DEFAULT_CONFIG)
+    config["rl"][0] = 2
+    config["lt_st"] = 5  # 5 channel light (RGBCW)
+    config["so"]["117"] = 1  # fading at fixed duration instead of fixed slew rate
+    mac = config["mac"]
+
+    async_fire_mqtt_message(
+        hass,
+        f"{DEFAULT_PREFIX}/{mac}/config",
+        json.dumps(config),
+    )
+    await hass.async_block_till_done()
+
+    async_fire_mqtt_message(hass, "tasmota_49A3BC/tele/LWT", "Online")
+    state = hass.states.get("light.test")
+    assert state.state == STATE_OFF
+    await hass.async_block_till_done()
+    await hass.async_block_till_done()
+    mqtt_mock.async_publish.reset_mock()
+
+    # Dim the light from 0->100: Speed should be 4*2=8
+    await common.async_turn_on(hass, "light.test", brightness=255, transition=4)
+    mqtt_mock.async_publish.assert_called_once_with(
+        "tasmota_49A3BC/cmnd/Backlog",
+        "NoDelay;Fade 1;NoDelay;Speed 8;NoDelay;Dimmer 100",
+        0,
+        False,
+    )
+    mqtt_mock.async_publish.reset_mock()
+
+    # Dim the light from 0->100: Speed should be capped at 40
+    await common.async_turn_on(hass, "light.test", brightness=255, transition=100)
+    mqtt_mock.async_publish.assert_called_once_with(
+        "tasmota_49A3BC/cmnd/Backlog",
+        "NoDelay;Fade 1;NoDelay;Speed 40;NoDelay;Dimmer 100",
+        0,
+        False,
+    )
+    mqtt_mock.async_publish.reset_mock()
+
+    # Dim the light from 0->0: Speed should be 4*2=8
+    await common.async_turn_on(hass, "light.test", brightness=0, transition=4)
+    mqtt_mock.async_publish.assert_called_once_with(
+        "tasmota_49A3BC/cmnd/Backlog",
+        "NoDelay;Fade 1;NoDelay;Speed 8;NoDelay;Power1 OFF",
+        0,
+        False,
+    )
+    mqtt_mock.async_publish.reset_mock()
+
+    # Dim the light from 0->50: Speed should be 4*2=8
+    await common.async_turn_on(hass, "light.test", brightness=128, transition=4)
+    mqtt_mock.async_publish.assert_called_once_with(
+        "tasmota_49A3BC/cmnd/Backlog",
+        "NoDelay;Fade 1;NoDelay;Speed 8;NoDelay;Dimmer 50",
+        0,
+        False,
+    )
+    mqtt_mock.async_publish.reset_mock()
+
+
 async def test_relay_as_light(hass, mqtt_mock, setup_tasmota):
     """Test relay show up as light in light mode."""
     config = copy.deepcopy(DEFAULT_CONFIG)