diff --git a/pyproject.toml b/pyproject.toml
index ffaff6a..2fe9e99 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@
 # Purpose: Build, dependency, and verification configuration for GoalRouter
 
 [build-system]
-requires = ["setuptools>=80,<81"]
+requires = ["setuptools>=80,<85"]
 build-backend = "setuptools.build_meta"
 
 [project]
@@ -26,7 +26,7 @@ dev = [
     "pytest>=8,<10",
     "pytest-asyncio>=1,<2",
     "ruff>=0.15.8,<0.16",
-    "setuptools>=80,<81",
+    "setuptools>=80,<85",
     "types-jsonschema>=4.23,<5",
     "types-PyYAML>=6.0.12,<7",
 ]