diff --git a/pyproject.toml b/pyproject.toml
index 6b27020480..242a09f54d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,6 +26,7 @@ dependencies = [
     "PyYAML~=6.0.1",
     "RestrictedPython~=7.0",
     "WeasyPrint==59.0",
+    "pydyf==0.10.0",
     "Werkzeug~=3.0.1",
     "Whoosh~=2.7.4",
     "beautifulsoup4~=4.12.2",