diff --git a/CHANGELOG.md b/CHANGELOG.md
index bf146cd..8dba290 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## v3.2.1
+### Bug Fixes
+* Fix crash when a static mesh has a missing material and `Write Properties as Static Values` is enabled. [(more)](https://github.com/d4rkc0d3r/d4rkAvatarOptimizer/issues/60)
+
 ## v3.2.0
 ### Changes
 * Remove option `Merge Regardless of Blend Shapes`. It is now always enabled because VRChat now uses unity 2022.
diff --git a/Editor/d4rkAvatarOptimizer.cs b/Editor/d4rkAvatarOptimizer.cs
index 0870861..37f2dbc 100644
--- a/Editor/d4rkAvatarOptimizer.cs
+++ b/Editor/d4rkAvatarOptimizer.cs
@@ -3131,7 +3131,7 @@ private void OptimizeMaterialsOnNonSkinnedMeshes()
                 continue;
             DisplayProgressBar($"Optimizing materials on {meshRenderer.name}");
             var path = GetPathToRoot(meshRenderer);
-            var mats = meshRenderer.sharedMaterials.Select((material, index) => (material, index)).ToList();
+            var mats = meshRenderer.sharedMaterials.Select((material, index) => (material, index)).Where(m => m.material != null).ToList();
             var alreadyOptimizedMaterials = new HashSet<Material>();
             foreach (var (material, index) in mats)
             {
diff --git a/package.json b/package.json
index ad3b94d..1bcce3c 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "d4rkpl4y3r.d4rkavataroptimizer",
   "displayName": "d4rkAvatarOptimizer",
-  "version": "3.2.0",
+  "version": "3.2.1",
   "unity": "2019.4",
   "description": "An optimizer aiming to reduce mesh & material count and more of VRChat 3.0 avatars.",
   "dependencies": {},