diff --git a/AssetIdRemapUtility/Editor/PackageImporter.cs b/AssetIdRemapUtility/Editor/PackageImporter.cs
index 8a9c76f6f..b0067be3e 100644
--- a/AssetIdRemapUtility/Editor/PackageImporter.cs
+++ b/AssetIdRemapUtility/Editor/PackageImporter.cs
@@ -4,6 +4,9 @@
 using System.Text;
 using UnityEditor;
 using UnityEngine;
+#if UNITY_6000_5_OR_NEWER
+using UnityEngine.Assemblies;
+#endif
 
 namespace UnityEngine.ProBuilder.AssetIdRemapUtility
 {
@@ -133,7 +136,11 @@ internal static bool IsPreProBuilder4InProject()
 
         internal static bool IsProBuilder4OrGreaterLoaded()
         {
+#if UNITY_6000_5_OR_NEWER
+            return CurrentAssemblies.GetLoadedAssemblies().Any(x => x.ToString().Contains("Unity.ProBuilder"));
+#else
             return AppDomain.CurrentDomain.GetAssemblies().Any(x => x.ToString().Contains("Unity.ProBuilder"));
+#endif
         }
     }
 }
diff --git a/Editor/EditorCore/EditorToolbarLoader.cs b/Editor/EditorCore/EditorToolbarLoader.cs
index 317773d7a..a2801762c 100644
--- a/Editor/EditorCore/EditorToolbarLoader.cs
+++ b/Editor/EditorCore/EditorToolbarLoader.cs
@@ -3,6 +3,9 @@
 using UnityEngine.ProBuilder;
 using System.Linq;
 using System.Reflection;
+#if UNITY_6000_5_OR_NEWER
+using UnityEngine.Assemblies;
+#endif
 
 namespace UnityEditor.ProBuilder
 {
@@ -132,7 +135,11 @@ internal static List<MenuAction> GetActions(bool forceReload = false)
 
         static void SearchForMenuAttributes(List<MenuAction> list)
         {
+#if UNITY_6000_5_OR_NEWER
+            foreach (var assembly in CurrentAssemblies.GetLoadedAssemblies())
+#else
             foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
+#endif
             {
                 try
                 {
diff --git a/Editor/EditorCore/ReflectionUtility.cs b/Editor/EditorCore/ReflectionUtility.cs
index f98d5677f..069ceac40 100644
--- a/Editor/EditorCore/ReflectionUtility.cs
+++ b/Editor/EditorCore/ReflectionUtility.cs
@@ -4,6 +4,9 @@
 using System.Reflection;
 using System.Collections.Generic;
 using UnityEngine.ProBuilder;
+#if UNITY_6000_5_OR_NEWER
+using UnityEngine.Assemblies;
+#endif
 
 namespace UnityEditor.ProBuilder
 {
@@ -37,7 +40,11 @@ public static Type GetType(string type, string assembly = null)
 
             if (t == null)
             {
+#if UNITY_6000_5_OR_NEWER
+                IEnumerable<Assembly> assemblies = CurrentAssemblies.GetLoadedAssemblies();
+#else
                 IEnumerable<Assembly> assemblies = AppDomain.CurrentDomain.GetAssemblies();
+#endif
 
                 if (assembly != null)
                     assemblies = assemblies.Where(x => x.FullName.Contains(assembly));