diff --git a/README.md b/README.md
index b516fdd..93957c4 100644
--- a/README.md
+++ b/README.md
@@ -24,8 +24,17 @@ cd osier
 pip install .
 # to also install the documentation dependencies
 pip install .[doc]
+
+# followed by 
+pip install pyomo==4.6.1
 ```
 
+[!NOTE]
+Although `pyomo` is a dependency, the current version of `pyomo` (6.7.1, as of 2/29/24) has a bug
+that prints erroneous errors during an `osier` simulation. Therefore, users are recommended to 
+install a specific version of `pyomo` after the main installation of `osier`. There is an open issue #50 
+related to this concern.
+
 ## Documentation
 The documentation for `osier` can be viewed [here](https://osier.readthedocs.io/en/latest/). 
 You can also build the docs locally with:
diff --git a/setup.py b/setup.py
index 4500922..5de7d8e 100644
--- a/setup.py
+++ b/setup.py
@@ -60,7 +60,6 @@
     'nrelpy',
     'unyt',
     'pyomo',
-    'pymoo',
     'pyentrp',
     'deap',]
 EXTRAS_REQUIRE = {