diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65a0431cd..5130bf6f9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
 - [Optimize: remote deprecated method](https://github.com/Tencent/spring-cloud-tencent/pull/697)
 - [Test:support environment variable metadata test](https://github.com/Tencent/spring-cloud-tencent/pull/698)
 - [Test: remote deprecated method in test](https://github.com/Tencent/spring-cloud-tencent/pull/706)
+- [upgrade protobuf-java.version to 3.21.7](https://github.com/Tencent/spring-cloud-tencent/pull/715)
 - [docs:update README.](https://github.com/Tencent/spring-cloud-tencent/pull/718)
 - [Fix:fix javadoc.](https://github.com/Tencent/spring-cloud-tencent/pull/721)
 - [Code optimization & correct comment](https://github.com/Tencent/spring-cloud-tencent/pull/722)
diff --git a/spring-cloud-starter-tencent-polaris-discovery/src/test/java/com/tencent/cloud/polaris/discovery/PolarisDiscoveryClientTest.java b/spring-cloud-starter-tencent-polaris-discovery/src/test/java/com/tencent/cloud/polaris/discovery/PolarisDiscoveryClientTest.java
index 41da53413..bfd67879c 100644
--- a/spring-cloud-starter-tencent-polaris-discovery/src/test/java/com/tencent/cloud/polaris/discovery/PolarisDiscoveryClientTest.java
+++ b/spring-cloud-starter-tencent-polaris-discovery/src/test/java/com/tencent/cloud/polaris/discovery/PolarisDiscoveryClientTest.java
@@ -32,7 +32,6 @@ import static com.tencent.polaris.test.common.Consts.SERVICE_PROVIDER;
 import static java.util.Collections.singletonList;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.anyString;
-import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
@@ -63,14 +62,12 @@ public class PolarisDiscoveryClientTest {
 
 	@Test
 	public void testGetServices() {
-
-//		when(polarisServiceDiscovery.getServices()).thenReturn(singletonList(SERVICE_PROVIDER));
-		doReturn(singletonList(SERVICE_PROVIDER)).when(polarisServiceDiscovery).getServices();
+		when(polarisServiceDiscovery.getServices()).thenReturn(singletonList(SERVICE_PROVIDER));
 
 		List<String> services = client.getServices();
 
-		assertThat(services).contains(SERVICE_PROVIDER).size().isEqualTo(1);
-
+		assertThat(services).size().isEqualTo(1);
+		assertThat(services.contains(SERVICE_PROVIDER)).isTrue();
 	}
 
 	@Test
diff --git a/spring-cloud-tencent-dependencies/pom.xml b/spring-cloud-tencent-dependencies/pom.xml
index 3c89b07cf..b7814c71d 100644
--- a/spring-cloud-tencent-dependencies/pom.xml
+++ b/spring-cloud-tencent-dependencies/pom.xml
@@ -78,7 +78,7 @@
 		<logback.version>1.2.11</logback.version>
 		<mocktio.version>4.5.1</mocktio.version>
 		<byte-buddy.version>1.12.10</byte-buddy.version>
-		<protobuf-java.version>3.16.1</protobuf-java.version>
+		<protobuf-java.version>3.21.7</protobuf-java.version>
 		<bcprov-jdk15on.version>1.69</bcprov-jdk15on.version>
 		<system-stubs-junit4.version>2.0.1</system-stubs-junit4.version>