diff --git a/com.unity.postprocessing/CHANGELOG.md b/com.unity.postprocessing/CHANGELOG.md
index bc8d4efac23..f7e59af8488 100644
--- a/com.unity.postprocessing/CHANGELOG.md
+++ b/com.unity.postprocessing/CHANGELOG.md
@@ -5,8 +5,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
 ### Fixed
-- 
+- Replaced deprecated Mono API with CoreCLR-compatible API
 
 ## [3.5.1] - 2025-09-19
 
diff --git a/com.unity.postprocessing/PostProcessing/Runtime/Utils/RuntimeUtilities.cs b/com.unity.postprocessing/PostProcessing/Runtime/Utils/RuntimeUtilities.cs
index 8e56107863f..cf0eb3588b0 100644
--- a/com.unity.postprocessing/PostProcessing/Runtime/Utils/RuntimeUtilities.cs
+++ b/com.unity.postprocessing/PostProcessing/Runtime/Utils/RuntimeUtilities.cs
@@ -10,6 +10,10 @@
 using UnityEditor;
 #endif
 
+#if UNITY_6000_5_OR_NEWER
+using UnityEngine.Assemblies;
+#endif
+
 namespace UnityEngine.Rendering.PostProcessing
 {
     using SceneManagement;
@@ -1211,7 +1215,11 @@ public static IEnumerable<Type> GetAllAssemblyTypes()
         {
             if (m_AssemblyTypes == null)
             {
+#if UNITY_6000_5_OR_NEWER
+                m_AssemblyTypes = CurrentAssemblies.GetLoadedAssemblies()
+#else
                 m_AssemblyTypes = AppDomain.CurrentDomain.GetAssemblies()
+#endif
                     .SelectMany(t =>
                     {
                         // Ugly hack to handle mis-versioned dlls