diff --git a/gridappsd-python-lib/pyproject.toml b/gridappsd-python-lib/pyproject.toml
index c69d02a..580abe4 100644
--- a/gridappsd-python-lib/pyproject.toml
+++ b/gridappsd-python-lib/pyproject.toml
@@ -19,7 +19,7 @@ dependencies = [
     "PyYAML>=6.0",
     "pytz>=2022.7",
     "dateutils>=0.6.7",
-    "stomp-py>=6.0.0",
+    "stomp-py==6.0.0",
     "requests>=2.28",
     "python-dotenv>=0.9",
     "loguru>=0.7",