diff --git a/UPDATING.md b/UPDATING.md
index 83909708f55f5..2c8ce25a17c4b 100644
--- a/UPDATING.md
+++ b/UPDATING.md
@@ -21,13 +21,19 @@ under the License.
 This file documents any backwards-incompatible changes in Superset and
 assists people when migrating to a new version.
 
+## Next
+
+* [8721](https://github.com/apache/incubator-superset/pull/8721): When using the cache
+warmup Celery task you should now specify the `SUPERSET_WEBSERVER_PROTOCOL` variable
+in your configuration (probably either "http" or "https"). This defaults to "http".
+
 ## 0.35.0
 
 * [8512](https://github.com/apache/incubator-superset/pull/8512): `DRUID_IS_ACTIVE` now
 defaults to False. To enable Druid-API-based functionality, override the
 `DRUID_IS_ACTIVE` configuration variable by setting it to `True` for your deployment.
 
-* [8450](https://github.com/apache/incubator-superset/pull/8450): The time ranger picker
+* [8450](https://github.com/apache/incubator-superset/pull/8450): The time range picker
 now uses UTC for the tooltips and default placeholder timestamps (sans timezone).
 
 * [8370](https://github.com/apache/incubator-superset/pull/8370): Deprecates
diff --git a/superset/config.py b/superset/config.py
index 7391e284e98fc..5b339acd26b9b 100644
--- a/superset/config.py
+++ b/superset/config.py
@@ -93,6 +93,7 @@ def _try_json_readsha(filepath):
 SUPERSET_WORKERS = 2  # deprecated
 SUPERSET_CELERY_WORKERS = 32  # deprecated
 
+SUPERSET_WEBSERVER_PROTOCOL = "http"
 SUPERSET_WEBSERVER_ADDRESS = "0.0.0.0"
 SUPERSET_WEBSERVER_PORT = 8088
 
diff --git a/superset/tasks/cache.py b/superset/tasks/cache.py
index 09cd1f344427c..2d2eee9eab463 100644
--- a/superset/tasks/cache.py
+++ b/superset/tasks/cache.py
@@ -75,8 +75,10 @@ def get_form_data(chart_id, dashboard=None):
 def get_url(chart):
     """Return external URL for warming up a given chart/table cache."""
     with app.test_request_context():
-        baseurl = "{SUPERSET_WEBSERVER_ADDRESS}:{SUPERSET_WEBSERVER_PORT}".format(
-            **app.config
+        baseurl = (
+            "{SUPERSET_WEBSERVER_PROTOCOL}://"
+            "{SUPERSET_WEBSERVER_ADDRESS}:"
+            "{SUPERSET_WEBSERVER_PORT}".format(**app.config)
         )
         return f"{baseurl}{chart.url}"
 
diff --git a/tests/strategy_tests.py b/tests/strategy_tests.py
index 3a0dc62c28228..31a6bdfb3c6e7 100644
--- a/tests/strategy_tests.py
+++ b/tests/strategy_tests.py
@@ -29,7 +29,7 @@
 
 from .base_tests import SupersetTestCase
 
-URL_PREFIX = "0.0.0.0:8081"
+URL_PREFIX = "http://0.0.0.0:8081"
 
 
 class CacheWarmUpTests(SupersetTestCase):