diff --git a/pom.xml b/pom.xml
index e5506f0..d0d533f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,8 +47,8 @@
         <commons-codec.version>1.22.0</commons-codec.version>
         <commons-lang3.version>3.20.0</commons-lang3.version>
         <fastjson2.version>2.0.62</fastjson2.version>
-        <guava.version>31.0.1-jre</guava.version>
-        <jackson.version>2.17.2</jackson.version>
+        <guava.version>33.8.0-jre</guava.version>
+        <jackson.version>2.22.3</jackson.version>
         <junit-jupiter.version>6.1.0</junit-jupiter.version>
         <lombok.version>1.18.46</lombok.version>
         <okhttp.version>4.9.3</okhttp.version>
diff --git a/src/test/java/io/agora/cloud/AgoraOkHttp3TemplateTest.java b/src/test/java/io/agora/cloud/AgoraOkHttp3TemplateTest.java
index bb3bd16..d21c73d 100644
--- a/src/test/java/io/agora/cloud/AgoraOkHttp3TemplateTest.java
+++ b/src/test/java/io/agora/cloud/AgoraOkHttp3TemplateTest.java
@@ -195,6 +195,21 @@ void shouldCreateRequestBuilderWithBody() throws Exception {
         assertNotNull(builder);
     }
 
+    @Test
+    void shouldSerializeGuavaRequestBodyWithJackson() throws Exception {
+        okhttp3.HttpUrl url = okhttp3.HttpUrl.parse("http://localhost/api");
+        java.util.Map<String, Object> body = com.google.common.collect.ImmutableMap.of(
+                "channel", "room-1", "uid", 42);
+        Request request = template.createRequestBuilder(url,
+                AgoraOkHttp3Template.HttpMethod.POST, null, body).build();
+        okio.Buffer buffer = new okio.Buffer();
+        request.body().writeTo(buffer);
+        com.fasterxml.jackson.databind.JsonNode json = new ObjectMapper().readTree(buffer.readUtf8());
+        assertEquals("room-1", json.get("channel").asText());
+        assertEquals(42, json.get("uid").asInt());
+        assertEquals("application/json;charset=UTF-8", request.body().contentType().toString());
+    }
+
     // --- MediaType constants ---
     @Test
     void shouldHaveMediaTypeConstants() {