diff --git a/pyproject.toml b/pyproject.toml
index 192d5bce..acb35433 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -84,7 +84,7 @@ klayout = [
   "vlsirtools"
 ]
 luminescent = [
-  "luminescent~=0.2.12",
+  "luminescent>=0.2.12,<0.4.0",
   "sortedcontainers"
 ]
 maintainer = [