diff --git a/setup.py b/setup.py
index b0e1123..7ed65f5 100644
--- a/setup.py
+++ b/setup.py
@@ -5,6 +5,7 @@
     "pyomo",
     "scipy==1.11",
     "gridx-egret",
+    "pint",
 ]
 
 setup(