diff --git a/README.md b/README.md
index 8d19b31..2fd6c77 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ using `#{version}` for versioning.
 ex)
 
 ``` json
-"com.netpyoung.webp": "https://github.com/netpyoung/unity.webp.git?path=unity_project/Assets/unity.webp#0.3.3"
+"com.netpyoung.webp": "https://github.com/netpyoung/unity.webp.git?path=unity_project/Assets/unity.webp#0.3.4"
 ```
 
 ## Example
diff --git a/unity_project/Assets/unity.webp/package.json b/unity_project/Assets/unity.webp/package.json
index b3ee16b..c526ec2 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": "0.3.3",
+    "version": "0.3.4",
     "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 9677c2d..1b40c33 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 = "0.3.3";
+        const string VERSION = "0.3.4";
         AssetDatabase.ExportPackage(
             new[] {"Assets/unity.webp"},
             $"../webp-{VERSION}.unitypackage",