diff --git a/pdm.lock b/pdm.lock
index 3ec5ad9..0245be6 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -671,7 +671,7 @@ summary = "Zopfli module for python"
 lock_version = "4.2"
 cross_platform = true
 groups = ["default", "debug", "lint", "server", "typing"]
-content_hash = "sha256:3e444bbd9316675d94247da1b274e9e3477eb3a09ccdad1b89c2ca014a63bd6e"
+content_hash = "sha256:6e61bc7dca17c6bb445784e6b17e1094ef816fe57c8585277d3e82bc4e9b8f24"
 
 [metadata.files]
 "asgiref 3.6.0" = [
diff --git a/pyproject.toml b/pyproject.toml
index b1fc1fa..439fc97 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,7 @@ dependencies = [
     "django-markdownx~=4.0",
     "django-recurrence~=1.11",
     "django-widget-tweaks~=1.4",
+    "django-stubs-ext~=4.2",
     "markdownify~=0.11",
     "mdformat~=0.7",
     "mdformat-tables~=0.4",