diff --git a/pyproject.toml b/pyproject.toml
index 0013377ef..257bcb15c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ Issues = "https://github.com/Libensemble/libensemble/issues"
 
 [build-system]
 build-backend = "setuptools.build_meta"
-requires = ["setuptools", "wheel", "pip>=24.3.1,<27", "setuptools>=75.1.0,<84"]
+requires = ["setuptools", "wheel", "pip>=24.3.1,<27", "setuptools>=75.1.0,<85"]
 
 [tool.setuptools.packages.find]
 where = ["."]