diff --git a/prereqs/pips/app_requirements.txt b/prereqs/pips/app_requirements.txt
index c70e7a01f5..cb3b379ff5 100644
--- a/prereqs/pips/app_requirements.txt
+++ b/prereqs/pips/app_requirements.txt
@@ -35,7 +35,7 @@ openvr==1.26.701
 openmm==8.2.0 ; platform_machine != "aarch64"
 packaging==24.2
 # as per Tristan's request in ticket #3055
-ParmEd==4.2.2
+ParmEd==4.3.0
 pep517==0.13.1
 # optional package to prevent warning in Python shell [#16571]
 pickleshare==0.7.5