diff --git a/setup.py b/setup.py
index f97cfaf9fe..fbc6e8be4d 100644
--- a/setup.py
+++ b/setup.py
@@ -69,7 +69,7 @@
         # primary requirements for unit and property models
         # allow X.Y.Z stable release(s) and X.Y+1.dev0 (i.e. the main branch after X.Y.Z)
         # disallow X.Y+1.0rc0 (i.e. forcing a manual update to this requirement)
-        "idaes-pse >=2.8.0,<2.9.0rc0",
+        "idaes-pse @ git+https://github.com/dallan-keylogic/idaes-pse.git@scale_model_true",  # "idaes-pse >=2.8.0,<2.9.0rc0",
         "pyomo>=6.6.1",
         "watertap-solvers",
         "pyyaml",  # watertap.core.wt_database