diff --git a/requirements.txt b/requirements.txt
index 2b7abfbce57..4d20af4a4c2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ grpcio<1.60.0
 leabra-psyneulink<0.3.3
 llvmlite<0.42
 matplotlib<3.7.3
-modeci_mdf<0.5, >=0.3.4; (platform_machine == 'AMD64' or platform_machine == 'x86_64') and platform_python_implementation == 'CPython' and implementation_name == 'cpython'
+modeci_mdf<0.5, >=0.4.1.1; (platform_machine == 'AMD64' or platform_machine == 'x86_64') and platform_python_implementation == 'CPython' and implementation_name == 'cpython'
 networkx<3.2
 numpy>=1.19.0, <1.24.5
 optuna<3.4.0