diff --git a/pyproject.toml b/pyproject.toml
index 5379d37..c288953 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ classifiers = [
   "Operating System :: OS Independent"
 ]
 dependencies = [
-  "gdsfactory~=8.8.9",
+  "gdsfactory>=8.8.9,<8.13.0",
   "gplugins[sax]>=1,<2"
 ]
 description = "CornerStone PDK"