diff --git a/homeassistant/components/rest/binary_sensor.py b/homeassistant/components/rest/binary_sensor.py
index ec8b3ba0122..c19bfe307d0 100644
--- a/homeassistant/components/rest/binary_sensor.py
+++ b/homeassistant/components/rest/binary_sensor.py
@@ -84,7 +84,7 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 
     if resource_template is not None:
         resource_template.hass = hass
-        resource = resource_template.render(parse_result=False)
+        resource = resource_template.async_render(parse_result=False)
 
     if value_template is not None:
         value_template.hass = hass
@@ -189,6 +189,6 @@ class RestBinarySensor(BinarySensorEntity):
     async def async_update(self):
         """Get the latest data from REST API and updates the state."""
         if self._resource_template is not None:
-            self.rest.set_url(self._resource_template.render(parse_result=False))
+            self.rest.set_url(self._resource_template.async_render(parse_result=False))
 
         await self.rest.async_update()
diff --git a/homeassistant/components/rest/sensor.py b/homeassistant/components/rest/sensor.py
index 323447ba1b3..826160604ba 100644
--- a/homeassistant/components/rest/sensor.py
+++ b/homeassistant/components/rest/sensor.py
@@ -103,7 +103,7 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 
     if resource_template is not None:
         resource_template.hass = hass
-        resource = resource_template.render(parse_result=False)
+        resource = resource_template.async_render(parse_result=False)
 
     if username and password:
         if config.get(CONF_AUTHENTICATION) == HTTP_DIGEST_AUTHENTICATION:
@@ -202,7 +202,7 @@ class RestSensor(Entity):
     async def async_update(self):
         """Get the latest data from REST API and update the state."""
         if self._resource_template is not None:
-            self.rest.set_url(self._resource_template.render(parse_result=False))
+            self.rest.set_url(self._resource_template.async_render(parse_result=False))
 
         await self.rest.async_update()
 
diff --git a/tests/components/rest/test_binary_sensor.py b/tests/components/rest/test_binary_sensor.py
index 276dc293f87..1f2c88f4278 100644
--- a/tests/components/rest/test_binary_sensor.py
+++ b/tests/components/rest/test_binary_sensor.py
@@ -116,7 +116,7 @@ async def test_setup_minimum_resource_template(hass):
         {
             "binary_sensor": {
                 "platform": "rest",
-                "resource_template": "http://localhost",
+                "resource_template": "{% set url = 'http://localhost' %}{{ url }}",
             }
         },
     )
diff --git a/tests/components/rest/test_sensor.py b/tests/components/rest/test_sensor.py
index 6a7e444cedd..d841f69e45f 100644
--- a/tests/components/rest/test_sensor.py
+++ b/tests/components/rest/test_sensor.py
@@ -102,7 +102,7 @@ async def test_setup_minimum_resource_template(hass):
         {
             "sensor": {
                 "platform": "rest",
-                "resource_template": "http://localhost",
+                "resource_template": "{% set url = 'http://localhost' %}{{ url }}",
             }
         },
     )