diff --git a/homeassistant/components/alexa/handlers.py b/homeassistant/components/alexa/handlers.py
index bd07b71ca29aa7983543aa607ecae103b874ff28..139defe831303733ee029bf72e8605b5cad14e78 100644
--- a/homeassistant/components/alexa/handlers.py
+++ b/homeassistant/components/alexa/handlers.py
@@ -412,7 +412,6 @@ async def async_api_lock(hass, config, directive, context):
     return response
 
 
-# Not supported by Alexa yet
 @HANDLERS.register(("Alexa.LockController", "Unlock"))
 async def async_api_unlock(hass, config, directive, context):
     """Process an unlock request."""
@@ -425,7 +424,12 @@ async def async_api_unlock(hass, config, directive, context):
         context=context,
     )
 
-    return directive.response()
+    response = directive.response()
+    response.add_context_property(
+        {"namespace": "Alexa.LockController", "name": "lockState", "value": "UNLOCKED"}
+    )
+
+    return response
 
 
 @HANDLERS.register(("Alexa.Speaker", "SetVolume"))
diff --git a/tests/components/alexa/test_smart_home.py b/tests/components/alexa/test_smart_home.py
index 78bdd8e09082a28602ea91e7a9a441e5090603eb..186cb850e341a933394673938994df8e685e88fc 100644
--- a/tests/components/alexa/test_smart_home.py
+++ b/tests/components/alexa/test_smart_home.py
@@ -403,12 +403,20 @@ async def test_lock(hass):
         "Alexa.LockController", "Lock", "lock#test", "lock.lock", hass
     )
 
-    # always return LOCKED for now
     properties = msg["context"]["properties"][0]
     assert properties["name"] == "lockState"
     assert properties["namespace"] == "Alexa.LockController"
     assert properties["value"] == "LOCKED"
 
+    _, msg = await assert_request_calls_service(
+        "Alexa.LockController", "Unlock", "lock#test", "lock.unlock", hass
+    )
+
+    properties = msg["context"]["properties"][0]
+    assert properties["name"] == "lockState"
+    assert properties["namespace"] == "Alexa.LockController"
+    assert properties["value"] == "UNLOCKED"
+
 
 async def test_media_player(hass):
     """Test media player discovery."""