diff --git a/History.md b/History.md
index b111b78..c293aeb 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,11 @@
+0.5.0 / 2015-05-02
+==================
+
+* replace WebSocket client with OkHttp WebSocket [b95505017]
+* add the hostnameVerifier option [b95505017]
+* fix EVENT_TRANSPORT event to fire upon a transport creation
+* fix invalid transport null check
+
 0.4.1 / 2015-02-08
 ==================
 
diff --git a/README.md b/README.md
index 5ba930e..4a30078 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Add the following dependency to your `pom.xml`.
   <dependency>
     <groupId>com.github.nkzawa</groupId>
     <artifactId>engine.io-client</artifactId>
-    <version>0.4.1</version>
+    <version>0.5.0</version>
   </dependency>
 </dependencies>
 ```
@@ -25,7 +25,7 @@ Add the following dependency to your `pom.xml`.
 Add it as a gradle dependency for Android Studio, in `build.gradle`:
 
 ```groovy
-compile 'com.github.nkzawa:engine.io-client:0.4.1'
+compile 'com.github.nkzawa:engine.io-client:0.5.0'
 ```
 
 ## Usage
diff --git a/pom.xml b/pom.xml
index 86f9647..46cc8ac 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.github.nkzawa</groupId>
   <artifactId>engine.io-client</artifactId>
-  <version>0.4.2-SNAPSHOT</version>
+  <version>0.5.0-SNAPSHOT</version>
   <packaging>jar</packaging>
   <name>engine.io-client</name>
   <description>Engine.IO Client Library for Java</description>