diff --git a/README.md b/README.md
index a9b726d..571413c 100644
--- a/README.md
+++ b/README.md
@@ -15,40 +15,30 @@
 
 choose your preference
 
-### using OpenUPM
+### using UPM
+
+using `#{version}` for versioning.
 
-As a shared dependency, this uses the openUPM package `com.system-community.systemruntimecompilerservicesunsafe`, you will need to add it to OpenUPM's scopes, and it will be pulled in by this package.
+ex)
 
-```json
+``` json
 {
   "dependencies": {
-    "com.netpyoung.webp": "0.3.8"
+    "com.netpyoung.webp": "https://github.com/netpyoung/unity.webp.git?path=unity_project/Assets/unity.webp#0.3.9",
+    "org.nuget.system.runtime.compilerservices.unsafe": "6.0.0"
   },
   "scopedRegistries": [
     {
-      "name": "package.openupm.com",
-      "url": "https://package.openupm.com",
+      "name": "Unity NuGet",
+      "url": "https://unitynuget-registry.azurewebsites.net",
       "scopes": [
-        "com.netpyoung.webp",
-        "com.system-community.systemruntimecompilerservicesunsafe"
+        "org.nuget"
       ]
     }
   ]
 }
 ```
 
-### using UPM
-
-using `#{version}` for versioning.
-
-ex)
-
-``` json
-"com.netpyoung.webp": "https://github.com/netpyoung/unity.webp.git?path=unity_project/Assets/unity.webp#0.3.8",
-"com.system-community.systemruntimecompilerservicesunsafe": "https://github.com/system-community/SystemRuntimeCompilerServicesUnsafe.git?path=Assets/_Root#6.0.0",
-
-```
-
 ## Example
 
 - check [Samples/ directory](https://github.com/netpyoung/unity.webp/tree/master/unity_project/Assets/Samples)
diff --git a/unity_project/Assets/unity.webp/package.json b/unity_project/Assets/unity.webp/package.json
index 94425b6..ad76839 100644
--- a/unity_project/Assets/unity.webp/package.json
+++ b/unity_project/Assets/unity.webp/package.json
@@ -1,7 +1,7 @@
 {
   "name": "com.netpyoung.webp",
   "displayName": "Unity.WebP",
-  "version": "0.3.8",
+  "version": "0.3.9",
   "unity": "2018.4",
   "description": "webp made easy for Unity3d.",
   "keywords": ["webp","unity.webp"],
diff --git a/unity_project/Assets/unitypackage-builder/Editor/PackageTool.cs b/unity_project/Assets/unitypackage-builder/Editor/PackageTool.cs
index 5a3f3e0..7d5c537 100644
--- a/unity_project/Assets/unitypackage-builder/Editor/PackageTool.cs
+++ b/unity_project/Assets/unitypackage-builder/Editor/PackageTool.cs
@@ -5,7 +5,7 @@ public class PackageTool
     [MenuItem("Package/Update Package")]
     private static void UpdatePackage()
     {
-        const string VERSION = "0.3.8";
+        const string VERSION = "0.3.9";
         AssetDatabase.ExportPackage(
             new[] {"Assets/unity.webp"},
             $"../webp-{VERSION}.unitypackage",