diff --git a/dubbo-common/pom.xml b/dubbo-common/pom.xml
index 98ecc9b87b..fc9e705d09 100644
--- a/dubbo-common/pom.xml
+++ b/dubbo-common/pom.xml
@@ -57,25 +57,9 @@
             <groupId>org.javassist</groupId>
             <artifactId>javassist</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.alibaba</groupId>
-            <artifactId>hessian-lite</artifactId>
-        </dependency>
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.esotericsoftware</groupId>
-            <artifactId>kryo</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>de.javakaffee</groupId>
-            <artifactId>kryo-serializers</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>de.ruedigermoeller</groupId>
-            <artifactId>fst</artifactId>
-        </dependency>
     </dependencies>
 </project>
\ No newline at end of file
diff --git a/dubbo-configcenter/dubbo-configcenter-apollo/src/main/java/org/apache/dubbo/configcenter/support/apollo/ApolloDynamicConfiguration.java b/dubbo-configcenter/dubbo-configcenter-apollo/src/main/java/org/apache/dubbo/configcenter/support/apollo/ApolloDynamicConfiguration.java
index 4433412046..bcc9a381d5 100644
--- a/dubbo-configcenter/dubbo-configcenter-apollo/src/main/java/org/apache/dubbo/configcenter/support/apollo/ApolloDynamicConfiguration.java
+++ b/dubbo-configcenter/dubbo-configcenter-apollo/src/main/java/org/apache/dubbo/configcenter/support/apollo/ApolloDynamicConfiguration.java
@@ -148,7 +148,7 @@ public class ApolloDynamicConfiguration implements DynamicConfiguration {
 
     @Override
     public String getProperties(String key, String group, long timeout) throws IllegalStateException {
-        if(StringUtils.isEmpty(group)) {
+        if (StringUtils.isEmpty(group)) {
             return dubboConfigFile.getContent();
         }
         if (group.equals(url.getParameter(APPLICATION_KEY))) {
diff --git a/dubbo-rpc/dubbo-rpc-api/pom.xml b/dubbo-rpc/dubbo-rpc-api/pom.xml
index aae1c05b6e..c0d7971a77 100644
--- a/dubbo-rpc/dubbo-rpc-api/pom.xml
+++ b/dubbo-rpc/dubbo-rpc-api/pom.xml
@@ -44,5 +44,10 @@
             <artifactId>dubbo-remoting-api</artifactId>
             <version>${project.parent.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>hessian-lite</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 </project>
\ No newline at end of file
diff --git a/dubbo-serialization/dubbo-serialization-api/src/main/java/org/apache/dubbo/common/serialize/support/SerializableClassRegistry.java b/dubbo-serialization/dubbo-serialization-api/src/main/java/org/apache/dubbo/common/serialize/support/SerializableClassRegistry.java
index 1a8fb69dbd..7e1ad6e384 100644
--- a/dubbo-serialization/dubbo-serialization-api/src/main/java/org/apache/dubbo/common/serialize/support/SerializableClassRegistry.java
+++ b/dubbo-serialization/dubbo-serialization-api/src/main/java/org/apache/dubbo/common/serialize/support/SerializableClassRegistry.java
@@ -16,8 +16,6 @@
  */
 package org.apache.dubbo.common.serialize.support;
 
-import com.esotericsoftware.kryo.Serializer;
-
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -45,7 +43,7 @@ public abstract class SerializableClassRegistry {
      * @param clazz object type
      * @param serializer object serializer
      */
-    public static void registerClass(Class clazz, Serializer serializer) {
+    public static void registerClass(Class clazz, Object serializer) {
         if (clazz == null) {
             throw new IllegalArgumentException("Class registered to kryo cannot be null!");
         }