diff --git a/pyproject.toml b/pyproject.toml
index 3dbed0c..969974f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ classifiers = [
   "Operating System :: OS Independent"
 ]
 dependencies = [
-  "gdsfactory~=8.4.0"
+  "gdsfactory>=8.4,<8.12"
 ]
 description = "gdsfactory VTT PDK"
 keywords = ["python"]