diff --git a/README.md b/README.md
index 3f5672b..bbe8ff1 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ The latest artifact is available on Maven Central. Add the following dependency
   <dependency>
     <groupId>com.github.nkzawa</groupId>
     <artifactId>engine.io-client</artifactId>
-    <version>0.2.2</version>
+    <version>0.2.3</version>
   </dependency>
 </dependencies>
 ```
diff --git a/pom.xml b/pom.xml
index 54834ce..75efa10 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>0.2.3-SNAPSHOT</version>
+  <version>0.2.3</version>
   <packaging>jar</packaging>
   <name>engine.io-client</name>
   <description>Engine.IO Client Library for Java</description>
@@ -65,6 +65,17 @@
     </dependency>
   </dependencies>
 
+  <distributionManagement>
+    <snapshotRepository>
+      <id>ossrh</id>
+      <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+    </snapshotRepository>
+    <repository>
+      <id>ossrh</id>
+      <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+    </repository>
+  </distributionManagement>
+
   <build>
     <plugins>
       <plugin>
@@ -93,7 +104,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-gpg-plugin</artifactId>
-        <version>1.4</version>
+        <version>1.5</version>
         <executions>
           <execution>
             <id>sign-artifacts</id>
@@ -104,6 +115,54 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+        <version>2.2.1</version>
+        <executions>
+          <execution>
+            <id>attach-sources</id>
+            <goals>
+              <goal>jar-no-fork</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <version>2.9.1</version>
+        <executions>
+          <execution>
+            <id>attach-javadocs</id>
+            <goals>
+              <goal>jar</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-release-plugin</artifactId>
+        <version>2.5</version>
+        <configuration>
+          <autoVersionSubmodules>true</autoVersionSubmodules>
+          <useReleaseProfile>false</useReleaseProfile>
+          <releaseProfiles>release</releaseProfiles>
+          <goals>deploy</goals>
+        </configuration>
+      </plugin>
+      <plugin>
+        <groupId>org.sonatype.plugins</groupId>
+        <artifactId>nexus-staging-maven-plugin</artifactId>
+        <version>1.6.2</version>
+        <extensions>true</extensions>
+        <configuration>
+          <serverId>ossrh</serverId>
+          <nexusUrl>https://oss.sonatype.org/</nexusUrl>
+          <autoReleaseAfterClose>true</autoReleaseAfterClose>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>exec-maven-plugin</artifactId>