diff --git a/pyproject.toml b/pyproject.toml
index 7987ca1..2c47728 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ description = "Framework for lighting and energy simulations"
 dependencies = [
     "epmodel>=0.6.0",
     "numpy>=1.24.4",
-    "pyradiance >= 0.5.0",
+    "pyradiance >= 0.5.1",
     "pywincalc>=3.1.0",
     "pyenergyplus_lbnl>=23.2.0",
     "scipy>=1.10.1",