diff --git a/demo/android-demo/app/build.gradle b/demo/android-demo/app/build.gradle
index 8d77fe1..ae7ed2d 100644
--- a/demo/android-demo/app/build.gradle
+++ b/demo/android-demo/app/build.gradle
@@ -49,7 +49,7 @@ dependencies {
     testImplementation 'androidx.test:runner:1.4.0-alpha05'
     testImplementation 'junit:junit:4.+'
     testImplementation 'org.robolectric:robolectric:4.5.1'
-    testImplementation 'com.alibaba.testable:testable-all:0.6.8'
+    testImplementation 'com.alibaba.testable:testable-all:0.6.9'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }
\ No newline at end of file
diff --git a/demo/java-demo/build.gradle b/demo/java-demo/build.gradle
index 960eb5f..9295202 100644
--- a/demo/java-demo/build.gradle
+++ b/demo/java-demo/build.gradle
@@ -13,8 +13,8 @@ repositories {
 
 dependencies {
     testImplementation('org.junit.jupiter:junit-jupiter:5.6.2')
-    testImplementation('com.alibaba.testable:testable-all:0.6.8')
-    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.8')
+    testImplementation('com.alibaba.testable:testable-all:0.6.9')
+    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.9')
 }
 
 tasks.withType(JavaCompile) {
diff --git a/demo/java-demo/pom.xml b/demo/java-demo/pom.xml
index adfa1a1..8114f79 100644
--- a/demo/java-demo/pom.xml
+++ b/demo/java-demo/pom.xml
@@ -12,7 +12,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <junit.version>5.6.2</junit.version>
-        <testable.version>0.6.8</testable.version>
+        <testable.version>0.6.9</testable.version>
     </properties>
 
     <dependencies>
diff --git a/demo/kotlin-demo/build.gradle.kts b/demo/kotlin-demo/build.gradle.kts
index 04990c9..6f3d455 100644
--- a/demo/kotlin-demo/build.gradle.kts
+++ b/demo/kotlin-demo/build.gradle.kts
@@ -17,8 +17,8 @@ dependencies {
     implementation("org.jetbrains.kotlin:kotlin-reflect")
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
     testImplementation("org.junit.jupiter:junit-jupiter:5.6.2")
-    testImplementation("com.alibaba.testable:testable-all:0.6.8")
-    testAnnotationProcessor("com.alibaba.testable:testable-processor:0.6.8")
+    testImplementation("com.alibaba.testable:testable-all:0.6.9")
+    testAnnotationProcessor("com.alibaba.testable:testable-processor:0.6.9")
 }
 
 tasks.withType<KotlinCompile> {
diff --git a/demo/kotlin-demo/pom.xml b/demo/kotlin-demo/pom.xml
index f909564..48deb5c 100644
--- a/demo/kotlin-demo/pom.xml
+++ b/demo/kotlin-demo/pom.xml
@@ -14,7 +14,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <junit.version>5.6.2</junit.version>
-        <testable.version>0.6.8</testable.version>
+        <testable.version>0.6.9</testable.version>
     </properties>
 
     <dependencies>
diff --git a/demo/spock-demo/build.gradle b/demo/spock-demo/build.gradle
index 5b26170..a2cc649 100644
--- a/demo/spock-demo/build.gradle
+++ b/demo/spock-demo/build.gradle
@@ -14,8 +14,8 @@ repositories {
 dependencies {
     testImplementation 'org.codehaus.groovy:groovy-all:3.0.7'
     testImplementation 'org.spockframework:spock-core:2.0-M5-groovy-3.0'
-    testImplementation('com.alibaba.testable:testable-all:0.6.8')
-    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.8')
+    testImplementation('com.alibaba.testable:testable-all:0.6.9')
+    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.9')
 }
 
 tasks.withType(JavaCompile) {
diff --git a/demo/spock-demo/pom.xml b/demo/spock-demo/pom.xml
index e3cbb8a..de3426e 100644
--- a/demo/spock-demo/pom.xml
+++ b/demo/spock-demo/pom.xml
@@ -12,7 +12,7 @@
 		<java.version>1.8</java.version>
 		<maven.compiler.source>1.8</maven.compiler.source>
 		<maven.compiler.target>1.8</maven.compiler.target>
-		<testable.version>0.6.8</testable.version>
+		<testable.version>0.6.9</testable.version>
 	</properties>
 
 	<dependencyManagement>
diff --git a/docs/en-us/doc/release-note.md b/docs/en-us/doc/release-note.md
index a7949e9..de5d41a 100644
--- a/docs/en-us/doc/release-note.md
+++ b/docs/en-us/doc/release-note.md
@@ -1,5 +1,9 @@
 # Release Note
 
+## 0.6.9
+- support mock invocation in lambda method or via function reference
+- fix a `NullPointerException` issue when `PrivateAccessor.invoke()` has `null` parameter
+
 ## 0.6.8
 - support `@DumpTo` annotation to dump bytecode of any transformed class
 - `PrivateAccessor.setStatic()` method now able to update static final members
diff --git a/docs/en-us/doc/setup.md b/docs/en-us/doc/setup.md
index 71acd72..78396be 100644
--- a/docs/en-us/doc/setup.md
+++ b/docs/en-us/doc/setup.md
@@ -16,7 +16,7 @@ It is recommended to add a `property` field that identifies the TestableMock ver
 
 ```xml
 <properties>
-    <testable.version>0.6.8</testable.version>
+    <testable.version>0.6.9</testable.version>
 </properties>
 ```
 
@@ -63,8 +63,8 @@ Add dependence of `TestableMock` in `build.gradle` file:
 
 ```groovy
 dependencies {
-    testImplementation('com.alibaba.testable:testable-all:0.6.8')
-    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.8')
+    testImplementation('com.alibaba.testable:testable-all:0.6.9')
+    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.9')
 }
 ```
 
diff --git a/docs/zh-cn/doc/release-note.md b/docs/zh-cn/doc/release-note.md
index 97bf288..28473ac 100644
--- a/docs/zh-cn/doc/release-note.md
+++ b/docs/zh-cn/doc/release-note.md
@@ -1,5 +1,9 @@
 # Release Note
 
+## 0.6.9
+- 支持Lambda方法中的调用和方法引用（issue-36）
+- 修复`PrivateAccessor.invoke()`调用参数为`null`时的空指针异常（issue-226）
+
 ## 0.6.8
 - 支持使用`@DumpTo`注解导出任意类处理后的字节码
 - 支持使用`PrivateAccessor.setStatic()`方法修改静态常量成员
diff --git a/docs/zh-cn/doc/setup.md b/docs/zh-cn/doc/setup.md
index 761fa9a..ed87366 100644
--- a/docs/zh-cn/doc/setup.md
+++ b/docs/zh-cn/doc/setup.md
@@ -16,7 +16,7 @@
 
 ```xml
 <properties>
-    <testable.version>0.6.8</testable.version>
+    <testable.version>0.6.9</testable.version>
 </properties>
 ```
 
@@ -63,8 +63,8 @@
 
 ```groovy
 dependencies {
-    testImplementation('com.alibaba.testable:testable-all:0.6.8')
-    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.8')
+    testImplementation('com.alibaba.testable:testable-all:0.6.9')
+    testAnnotationProcessor('com.alibaba.testable:testable-processor:0.6.9')
 }
 ```
 
diff --git a/testable-agent/pom.xml b/testable-agent/pom.xml
index 718e5ad..1f710b5 100755
--- a/testable-agent/pom.xml
+++ b/testable-agent/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.alibaba.testable</groupId>
         <artifactId>testable-parent</artifactId>
-        <version>0.6.8</version>
+        <version>0.6.9</version>
         <relativePath>../testable-parent</relativePath>
     </parent>
     <artifactId>testable-agent</artifactId>
diff --git a/testable-all/pom.xml b/testable-all/pom.xml
index aeeeae7..be367fc 100644
--- a/testable-all/pom.xml
+++ b/testable-all/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.alibaba.testable</groupId>
         <artifactId>testable-parent</artifactId>
-        <version>0.6.8</version>
+        <version>0.6.9</version>
         <relativePath>../testable-parent</relativePath>
     </parent>
     <artifactId>testable-all</artifactId>
diff --git a/testable-core/pom.xml b/testable-core/pom.xml
index 2709493..2ff778a 100644
--- a/testable-core/pom.xml
+++ b/testable-core/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.alibaba.testable</groupId>
         <artifactId>testable-parent</artifactId>
-        <version>0.6.8</version>
+        <version>0.6.9</version>
         <relativePath>../testable-parent</relativePath>
     </parent>
     <artifactId>testable-core</artifactId>
diff --git a/testable-maven-plugin/pom.xml b/testable-maven-plugin/pom.xml
index d694c17..a0508d0 100644
--- a/testable-maven-plugin/pom.xml
+++ b/testable-maven-plugin/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.alibaba.testable</groupId>
         <artifactId>testable-parent</artifactId>
-        <version>0.6.8</version>
+        <version>0.6.9</version>
         <relativePath>../testable-parent</relativePath>
     </parent>
     <artifactId>testable-maven-plugin</artifactId>
diff --git a/testable-parent/pom.xml b/testable-parent/pom.xml
index 84dcb20..4592353 100644
--- a/testable-parent/pom.xml
+++ b/testable-parent/pom.xml
@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.alibaba.testable</groupId>
     <artifactId>testable-parent</artifactId>
-    <version>0.6.8</version>
+    <version>0.6.9</version>
     <packaging>pom</packaging>
     <name>testable-parent</name>
     <description>Unit test enhancement toolkit</description>
@@ -42,7 +42,7 @@
         <plugin.gpg.version>1.6</plugin.gpg.version>
         <plugin.staging.version>1.6.8</plugin.staging.version>
         <plugin.maven.version>3.6.0</plugin.maven.version>
-        <testable.version>0.6.8</testable.version>
+        <testable.version>0.6.9</testable.version>
     </properties>
 
     <profiles>
diff --git a/testable-processor/pom.xml b/testable-processor/pom.xml
index 1e8aaa5..e229da8 100644
--- a/testable-processor/pom.xml
+++ b/testable-processor/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.alibaba.testable</groupId>
         <artifactId>testable-parent</artifactId>
-        <version>0.6.8</version>
+        <version>0.6.9</version>
         <relativePath>../testable-parent</relativePath>
     </parent>
     <artifactId>testable-processor</artifactId>