diff --git a/pyproject.toml b/pyproject.toml
index 31b7027e..b6451444 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ dependencies = [
     "pandas>=2.2.3,<4.0.0",
     "scikit-image>=0.25.2,<0.27.0",
     "scikit-fmm==2025.6.23",
-    "trimesh>=4.6.4,<5.0.0",
+    "trimesh>=4.6.4,<6.0.0",
     "rocketcea>=1.2.1,<2.0.0",
     "coolprop>=6.7.0,<9.0.0",
 ]