diff --git a/pyproject.toml b/pyproject.toml
index ce9b9c90..d546cae1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -143,7 +143,7 @@ constraints = [
 
 [tool.uv]
 package = true
-default-groups = "all"
+default-groups = ["all"]
 
 [tool.setuptools.packages.find]
 include = ["docling*"]