diff --git a/.github/workflows/java.yml b/.github/workflows/java.yml
index 95e8ccf8d..7f9632834 100644
--- a/.github/workflows/java.yml
+++ b/.github/workflows/java.yml
@@ -49,17 +49,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        jdk: [8, 9]
+        jdk: [11, 17]
         optimizely_default_parser: [GSON_CONFIG_PARSER, JACKSON_CONFIG_PARSER, JSON_CONFIG_PARSER, JSON_SIMPLE_CONFIG_PARSER]
     steps:
       - name: checkout
         uses: actions/checkout@v4
       
       - name: set up JDK ${{ matrix.jdk }}
-        uses: AdoptOpenJDK/install-jdk@v1
+        uses: actions/setup-java@v4
         with:
-          version: ${{ matrix.jdk }}
-          architecture: x64
+          java-version: ${{ matrix.jdk }}
+          distribution: 'temurin'
       
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew
diff --git a/core-api/src/main/java/com/optimizely/ab/event/internal/serializer/JacksonSerializer.java b/core-api/src/main/java/com/optimizely/ab/event/internal/serializer/JacksonSerializer.java
index 6087b4cce..5c1d586fd 100644
--- a/core-api/src/main/java/com/optimizely/ab/event/internal/serializer/JacksonSerializer.java
+++ b/core-api/src/main/java/com/optimizely/ab/event/internal/serializer/JacksonSerializer.java
@@ -1,6 +1,6 @@
 /**
  *
- *    Copyright 2016-2017, 2019, Optimizely and contributors
+ *    Copyright 2016-2017, 2019, 2025 Optimizely and contributors
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -19,13 +19,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 
 class JacksonSerializer implements Serializer {
 
     private ObjectMapper mapper =
         new ObjectMapper().setPropertyNamingStrategy(
-            PropertyNamingStrategy.SNAKE_CASE);
+            PropertyNamingStrategies.SNAKE_CASE);
 
     public <T> String serialize(T payload) {
         mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
diff --git a/core-api/src/test/java/com/optimizely/ab/event/internal/serializer/JacksonSerializerTest.java b/core-api/src/test/java/com/optimizely/ab/event/internal/serializer/JacksonSerializerTest.java
index fb068e3ab..79974a986 100644
--- a/core-api/src/test/java/com/optimizely/ab/event/internal/serializer/JacksonSerializerTest.java
+++ b/core-api/src/test/java/com/optimizely/ab/event/internal/serializer/JacksonSerializerTest.java
@@ -18,7 +18,7 @@
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 
-import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.optimizely.ab.event.internal.payload.EventBatch;
 
 import org.junit.Test;
@@ -42,7 +42,7 @@ public class JacksonSerializerTest {
     private JacksonSerializer serializer = new JacksonSerializer();
     private ObjectMapper mapper =
         new ObjectMapper().setPropertyNamingStrategy(
-            PropertyNamingStrategy.SNAKE_CASE);
+            PropertyNamingStrategies.SNAKE_CASE);
 
 
     @Test
diff --git a/java-quickstart/build.gradle b/java-quickstart/build.gradle
index a58fb090e..ef86b3045 100644
--- a/java-quickstart/build.gradle
+++ b/java-quickstart/build.gradle
@@ -4,7 +4,11 @@ dependencies {
     implementation project(':core-api')
     implementation project(':core-httpclient-impl')
 
-    implementation group: 'com.google.code.gson', name: 'gson', version: gsonVersion
+    // implementation group: 'com.google.code.gson', name: 'gson', version: gsonVersion
+    implementation 'com.fasterxml.jackson.core:jackson-core:2.17.0'
+    implementation 'com.fasterxml.jackson.core:jackson-annotations:2.17.0'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.17.0'
+
     implementation group: 'org.apache.httpcomponents', name: 'httpclient', version: httpClientVersion
     implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: log4jVersion
     implementation group: 'org.apache.logging.log4j', name: 'log4j-core', version: log4jVersion