diff --git a/API-Editor/com.anatawa12.avatar-optimizer.api.editor.asmdef b/API-Editor/com.anatawa12.avatar-optimizer.api.editor.asmdef
index e4829a5ca..1669ab2cf 100644
--- a/API-Editor/com.anatawa12.avatar-optimizer.api.editor.asmdef
+++ b/API-Editor/com.anatawa12.avatar-optimizer.api.editor.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "com.anatawa12.avatar-optimizer.api.editor",
+    "rootNamespace": "Anatawa12.AvatarOptimizer.API",
     "references": [],
     "includePlatforms": [
         "Editor"
diff --git a/Editor/com.anatawa12.avatar-optimizer.editor.asmdef b/Editor/com.anatawa12.avatar-optimizer.editor.asmdef
index c13a49f02..cac5a2e32 100644
--- a/Editor/com.anatawa12.avatar-optimizer.editor.asmdef
+++ b/Editor/com.anatawa12.avatar-optimizer.editor.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "com.anatawa12.avatar-optimizer.editor",
+    "rootNamespace": "Anatawa12.AvatarOptimizer",
     "references": [
         "com.anatawa12.custom-localization-for-editor-extension",
         "com.anatawa12.custom-localization-for-editor-extension.runtime",
diff --git a/Internal/PrefabSafeSet/Editor/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.editor.asmdef b/Internal/PrefabSafeSet/Editor/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.editor.asmdef
index ba54ca0a9..ac891e5e5 100644
--- a/Internal/PrefabSafeSet/Editor/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.editor.asmdef
+++ b/Internal/PrefabSafeSet/Editor/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.editor.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "com.anatawa12.avatar-optimizer.internal.prefab-safe-set.editor",
+    "rootNamespace": "Anatawa12.AvatarOptimizer.PrefabSafeSet",
     "references": [
         "com.anatawa12.custom-localization-for-editor-extension",
         "com.anatawa12.custom-localization-for-editor-extension.runtime",
diff --git a/Internal/PrefabSafeSet/Runtime/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.asmdef b/Internal/PrefabSafeSet/Runtime/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.asmdef
index d54199533..225088281 100644
--- a/Internal/PrefabSafeSet/Runtime/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.asmdef
+++ b/Internal/PrefabSafeSet/Runtime/com.anatawa12.avatar-optimizer.internal.prefab-safe-set.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "com.anatawa12.avatar-optimizer.internal.prefab-safe-set",
+    "rootNamespace": "Anatawa12.AvatarOptimizer.PrefabSafeSet",
     "references": [
         "com.anatawa12.custom-localization-for-editor-extension.runtime"
     ],
diff --git a/Internal/UnsafeUtils/com.anatawa12.avatar-optimizer.internal.unsafe.asmdef b/Internal/UnsafeUtils/com.anatawa12.avatar-optimizer.internal.unsafe.asmdef
index d99176784..17eec6720 100644
--- a/Internal/UnsafeUtils/com.anatawa12.avatar-optimizer.internal.unsafe.asmdef
+++ b/Internal/UnsafeUtils/com.anatawa12.avatar-optimizer.internal.unsafe.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "com.anatawa12.avatar-optimizer.internal.unsafe",
+    "rootNamespace": "Anatawa12.AvatarOptimizer",
     "references": [],
     "includePlatforms": [],
     "excludePlatforms": [],
diff --git a/Localization/com.anatawa12.avatar-optimizer.localization.asmdef b/Localization/com.anatawa12.avatar-optimizer.localization.asmdef
index 7cdea9780..b5404c0ea 100644
--- a/Localization/com.anatawa12.avatar-optimizer.localization.asmdef
+++ b/Localization/com.anatawa12.avatar-optimizer.localization.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "com.anatawa12.avatar-optimizer.localization",
+    "rootNamespace": "Anatawa12.AvatarOptimizer",
     "references": [],
     "includePlatforms": [
         "Editor"
diff --git a/Runtime/com.anatawa12.avatar-optimizer.runtime.asmdef b/Runtime/com.anatawa12.avatar-optimizer.runtime.asmdef
index 6b6ed4092..01307d7fb 100644
--- a/Runtime/com.anatawa12.avatar-optimizer.runtime.asmdef
+++ b/Runtime/com.anatawa12.avatar-optimizer.runtime.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "com.anatawa12.avatar-optimizer.runtime",
+    "rootNamespace": "Anatawa12.AvatarOptimizer",
     "references": [
         "com.anatawa12.custom-localization-for-editor-extension.runtime",
         "com.anatawa12.avatar-optimizer.internal.prefab-safe-set",