diff --git a/docs/en-us/doc/release-note.md b/docs/en-us/doc/release-note.md
index dbbea65..d73998f 100644
--- a/docs/en-us/doc/release-note.md
+++ b/docs/en-us/doc/release-note.md
@@ -1,5 +1,9 @@
 # Release Note
 
+## 0.4.10
+- fix an issue of using mock in lambda expression
+- fix the NullPointerException when invoke private method with parameter value `null`
+
 ## 0.4.9
 - fix an issue cause by improperly bytecode processing while using `targetClass` parameter
 - auto validate access target of `PrivateAccessor`, improve resistance to code refactoring
diff --git a/docs/zh-cn/doc/release-note.md b/docs/zh-cn/doc/release-note.md
index 01295ab..5168327 100644
--- a/docs/zh-cn/doc/release-note.md
+++ b/docs/zh-cn/doc/release-note.md
@@ -1,5 +1,9 @@
 # Release Note
 
+## 0.4.10
+- 修复在Lambda函数中使用Mock出错的BUG（issue-44）
+- 修复调用私有方法时参数值不能为null的问题（issue-27）
+
 ## 0.4.9
 - 修复发起调用的对象不是局部或成员变量时Mock出错的BUG (issue-40)
 - 增加`PrivateAccessor`访问目标有效性检查，提高抗代码重构能力 (issue-21)
diff --git a/testable-agent/src/main/java/com/alibaba/testable/agent/handler/SourceClassHandler.java b/testable-agent/src/main/java/com/alibaba/testable/agent/handler/SourceClassHandler.java
index 3322681..d299809 100644
--- a/testable-agent/src/main/java/com/alibaba/testable/agent/handler/SourceClassHandler.java
+++ b/testable-agent/src/main/java/com/alibaba/testable/agent/handler/SourceClassHandler.java
@@ -175,10 +175,11 @@ public class SourceClassHandler extends BaseClassHandler {
             case Opcodes.INVOKESPECIAL:
             case Opcodes.INVOKEVIRTUAL:
             case Opcodes.INVOKEINTERFACE:
-                return stackEffectOfInvocation(instruction) + 1;
+                return stackEffectOfInvocation(((MethodInsnNode)instruction).desc) + 1;
             case Opcodes.INVOKESTATIC:
+                return stackEffectOfInvocation(((MethodInsnNode)instruction).desc);
             case Opcodes.INVOKEDYNAMIC:
-                return stackEffectOfInvocation(instruction);
+                return stackEffectOfInvocation(((InvokeDynamicInsnNode)instruction).desc);
             case -1:
                 // either LabelNode or LineNumberNode
                 return 0;
@@ -187,8 +188,7 @@ public class SourceClassHandler extends BaseClassHandler {
         }
     }
 
-    private int stackEffectOfInvocation(AbstractInsnNode instruction) {
-        String desc = ((MethodInsnNode)instruction).desc;
+    private int stackEffectOfInvocation(String desc) {
         return ClassUtil.getParameterTypes(desc).size() - (ClassUtil.getReturnType(desc).isEmpty() ? 0 : 1);
     }