diff --git a/README.md b/README.md
index 9e192903..2dfa8932 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The recommended way to use the Aliyun OSS SDK for Java in your project is to con
 <dependency>
     <groupId>com.aliyun.oss</groupId>
     <artifactId>aliyun-sdk-oss</artifactId>
-    <version>2.8.2</version>
+    <version>2.8.3</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index e3626be6..6b90ead8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 
     <groupId>com.aliyun.oss</groupId>
     <artifactId>aliyun-sdk-oss</artifactId>
-    <version>2.8.2</version>
+    <version>2.8.3</version>
     <packaging>jar</packaging>
     <name>Aliyun OSS SDK for Java</name>
     <description>The Aliyun OSS SDK for Java used for accessing Aliyun Object Storage Service</description>
@@ -30,10 +30,16 @@
             <version>1.1</version>
         </dependency>
         <dependency>
-            <groupId>net.sf.json-lib</groupId>
-            <artifactId>json-lib</artifactId>
-            <version>2.4</version>
-            <classifier>jdk15</classifier>
+            <groupId>com.sun.jersey</groupId>
+            <artifactId>jersey-json</artifactId>
+            <version>1.9</version>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>stax</groupId>
+                    <artifactId>stax-api</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
diff --git a/src/test/java/com/aliyun/oss/integrationtests/ImageProcessTest.java b/src/test/java/com/aliyun/oss/integrationtests/ImageProcessTest.java
index 43194229..b61548fe 100644
--- a/src/test/java/com/aliyun/oss/integrationtests/ImageProcessTest.java
+++ b/src/test/java/com/aliyun/oss/integrationtests/ImageProcessTest.java
@@ -26,9 +26,9 @@
 import java.util.Date;
 
 import junit.framework.Assert;
-import net.sf.json.JSONObject;
 
-import org.apache.commons.beanutils.PropertyUtils;
+import org.codehaus.jettison.json.JSONException;
+import org.codehaus.jettison.json.JSONObject;
 import org.junit.Test;
 
 import com.aliyun.oss.HttpMethod;
@@ -264,7 +264,7 @@ public void testGeneratePresignedUrlWithProcess() {
 		}
 	}
     
-    private static ImageInfo getImageInfo(final String bucket, final String image) throws IOException, IllegalAccessException, InvocationTargetException, NoSuchMethodException {
+    private static ImageInfo getImageInfo(final String bucket, final String image) throws IOException, IllegalAccessException, InvocationTargetException, NoSuchMethodException, JSONException {
         GetObjectRequest request = new GetObjectRequest(bucketName, image);
         request.setProcess("image/info");
         OSSObject ossObject = ossClient.getObject(request);
@@ -272,14 +272,12 @@ private static ImageInfo getImageInfo(final String bucket, final String image) t
         String jsonStr = IOUtils.readStreamAsString(ossObject.getObjectContent(), "UTF-8");
         ossObject.getObjectContent().close();
         
-        JSONObject jsonObject = JSONObject.fromObject(jsonStr);
-        Object bean = JSONObject.toBean(jsonObject); 
-        
-        long height = Long.parseLong((String) PropertyUtils.getProperty(PropertyUtils.getProperty(bean, "ImageHeight"), "value"));
-        long width = Long.parseLong((String) PropertyUtils.getProperty(PropertyUtils.getProperty(bean, "ImageWidth"), "value"));
-        long size = Long.parseLong((String) PropertyUtils.getProperty(PropertyUtils.getProperty(bean, "FileSize"), "value"));
-        String format = (String) PropertyUtils.getProperty(PropertyUtils.getProperty(bean, "Format"), "value");
-        
+        JSONObject jsonObject = new JSONObject(jsonStr);
+
+        long height = jsonObject.getJSONObject("ImageHeight").getLong("value");
+        long width = jsonObject.getJSONObject("ImageWidth").getLong("value");
+        long size = jsonObject.getJSONObject("FileSize").getLong("value");
+        String format = jsonObject.getJSONObject("Format").getString("value");
         return new ImageInfo(height, width, size, format);
     }
     
diff --git a/src/test/java/com/aliyun/oss/integrationtests/SecurityTokenTest.java b/src/test/java/com/aliyun/oss/integrationtests/SecurityTokenTest.java
index c198f1b8..1e3f9df0 100644
--- a/src/test/java/com/aliyun/oss/integrationtests/SecurityTokenTest.java
+++ b/src/test/java/com/aliyun/oss/integrationtests/SecurityTokenTest.java
@@ -32,6 +32,7 @@
 
 import junit.framework.Assert;
 
+import org.codehaus.jettison.json.JSONException;
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -72,7 +73,7 @@ public class SecurityTokenTest {
 
     @SuppressWarnings("deprecation")
 	@Test
-    public void testBucketOperationsWithToken() {
+    public void testBucketOperationsWithToken() throws JSONException {
         List<String> actions = new ArrayList<String>();
         actions.add("oss:ListBuckets");
         List<String> resources = new ArrayList<String>();
@@ -417,7 +418,7 @@ public void testBucketOperationsWithToken() {
     }
     
     @Test
-    public void testObjectOperationsWithToken() {
+    public void testObjectOperationsWithToken() throws JSONException {
         List<String> actions = new ArrayList<String>();
         List<String> resources = new ArrayList<String>();
         
diff --git a/src/test/java/com/aliyun/oss/integrationtests/TestUtils.java b/src/test/java/com/aliyun/oss/integrationtests/TestUtils.java
index ba5aaa5f..a8fc81f0 100644
--- a/src/test/java/com/aliyun/oss/integrationtests/TestUtils.java
+++ b/src/test/java/com/aliyun/oss/integrationtests/TestUtils.java
@@ -43,8 +43,6 @@
 import javax.net.ssl.X509TrustManager;
 
 import junit.framework.Assert;
-import net.sf.json.JSONArray;
-import net.sf.json.JSONObject;
 
 import org.apache.http.HttpResponse;
 import org.apache.http.NameValuePair;
@@ -65,6 +63,9 @@
 import com.aliyun.oss.model.InitiateMultipartUploadRequest;
 import com.aliyun.oss.model.InitiateMultipartUploadResult;
 import com.aliyun.oss.model.PartETag;
+import org.codehaus.jettison.json.JSONArray;
+import org.codehaus.jettison.json.JSONException;
+import org.codehaus.jettison.json.JSONObject;
 
 @SuppressWarnings("deprecation")
 public class TestUtils {
@@ -342,21 +343,21 @@ public void setSecurityToken(String securityToken) {
         }
     }
     
-    public static OSSClient createSessionClient(List<String> actions, List<String> resources) {
+    public static OSSClient createSessionClient(List<String> actions, List<String> resources) throws JSONException {
         String tokenPolicy = jsonizeTokenPolicy(actions, resources, true);
         StsToken token = getStsToken("", "", 3600, tokenPolicy);
         return new OSSClient(OSS_TEST_ENDPOINT, token.accessKeyId, token.secretAccessKey, token.securityToken,
                 new ClientConfiguration().setSupportCname(false));
     }
     
-    public static String jsonizeTokenPolicy(List<String> actions, List<String> resources, boolean allow) {
+    public static String jsonizeTokenPolicy(List<String> actions, List<String> resources, boolean allow) throws JSONException {
         JSONObject stmtJsonObject = new JSONObject();
         stmtJsonObject.put("Action", actions);
         stmtJsonObject.put("Resource", resources);
         stmtJsonObject.put("Effect", allow ? "Allow" : "Deny");
 
         JSONArray stmtJsonArray = new JSONArray();
-        stmtJsonArray.add(0, stmtJsonObject);
+        stmtJsonArray.put(0, stmtJsonObject);
 
         JSONObject policyJsonObject = new JSONObject();
         policyJsonObject.put("Version", "1");
@@ -401,7 +402,7 @@ public static StsToken getStsToken(String grantor, String grantee,
                 System.out.println(line);
             }
             
-            JSONObject tokenJsonObject = JSONObject.fromObject(tokenString.toString());
+            JSONObject tokenJsonObject = new JSONObject(tokenString.toString());
             JSONObject credsJsonObjson = tokenJsonObject.getJSONObject("Credentials");
             String accessKeyId = credsJsonObjson.getString("AccessKeyId");
             String secretAccessKey = credsJsonObjson.getString("AccessKeySecret");