diff --git a/pyproject.toml b/pyproject.toml
index e1cd00aad5..d9a263e291 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,8 +27,6 @@ dependencies = [
     "PyYAML~=6.0.3",
     "RestrictedPython~=8.1",
     "WeasyPrint==68.0",
-    # we don't use tinycss2 directly, but pinned to ensure compatibility with WeasyPrint and bleach
-    "tinycss2~=1.5.1,<1.6",
     "pydyf==0.12.1",
     "Werkzeug==3.1.5",
     "Whoosh~=2.7.4",