diff --git a/pyproject.toml b/pyproject.toml
index 3ce1a8a91..9fda92dfc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,7 +67,7 @@ requires = [
 build-backend = "setuptools.build_meta"
 
 [project.optional-dependencies]
-GPU = ["cupy-cuda12x"]
+GPU = ["cupy-cuda13x"]
 test = ["pytest"]
 all = ["tritonserver[GPU]", "tritonserver[test]"]