diff --git a/data/defaults.yaml b/data/defaults.yaml
--- a/data/defaults.yaml
+++ b/data/defaults.yaml
@@ -1608,6 +1608,9 @@
   stretch:
     - python3-django
     - python-django-common
+  buster:
+    - python3-django
+    - python3-typing-extensions
 swh::deploy::deposit::backported_packages: "%{alias('swh::deploy::webapp::backported_packages')}"
 
 swh::deploy::webapp::sentry_swh_package: swh.web