diff --git a/.github/workflows/main-build.yml b/.github/workflows/main-build.yml
index 8248c3d26f..07f8b29fa2 100644
--- a/.github/workflows/main-build.yml
+++ b/.github/workflows/main-build.yml
@@ -194,7 +194,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-java@v4
         with:
-          java-version: 17
+          java-version: 21
           distribution: 'temurin'
       - uses: gradle/wrapper-validation-action@v1
 
@@ -219,7 +219,7 @@ jobs:
           key: ${{ runner.os }}-maven-local-${{ hashFiles('.github/patches/opentelemetry-java*.patch') }}
 
       - name: Pull base image of Contract Tests Sample Apps
-        run: docker pull public.ecr.aws/docker/library/amazoncorretto:17-alpine
+        run: docker pull public.ecr.aws/docker/library/amazoncorretto:21-alpine
 
       - name: Build snapshot with Gradle
         uses: gradle/gradle-build-action@v3
diff --git a/.github/workflows/nightly-upstream-snapshot-build.yml b/.github/workflows/nightly-upstream-snapshot-build.yml
index ec7c607354..a364358265 100644
--- a/.github/workflows/nightly-upstream-snapshot-build.yml
+++ b/.github/workflows/nightly-upstream-snapshot-build.yml
@@ -120,7 +120,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-java@v4
         with:
-          java-version: 17
+          java-version: 21
           distribution: 'temurin'
       - uses: gradle/wrapper-validation-action@v1
 
@@ -136,7 +136,7 @@ jobs:
           registry: public.ecr.aws
 
       - name: Pull base image of Contract Tests Sample Apps
-        run: docker pull public.ecr.aws/docker/library/amazoncorretto:17-alpine
+        run: docker pull public.ecr.aws/docker/library/amazoncorretto:21-alpine
 
       - name: Build snapshot with Gradle
         uses: gradle/gradle-build-action@v3
diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index 38989dc65c..9e47a15bce 100644
--- a/.github/workflows/pr-build.yml
+++ b/.github/workflows/pr-build.yml
@@ -81,9 +81,15 @@ jobs:
         with:
           arguments: build integrationTests --stacktrace -PenableCoverage=true -PlocalDocker=true
 
+      - name: Set up Java version for tests
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: temurin
+
       - name: Pull base image of Contract Tests Sample Apps
         if: ${{ matrix.os == 'ubuntu-latest' }}
-        run: docker pull public.ecr.aws/docker/library/amazoncorretto:17-alpine
+        run: docker pull public.ecr.aws/docker/library/amazoncorretto:21-alpine
 
       - name: Run contract tests
         uses: gradle/gradle-build-action@v3
@@ -91,6 +97,12 @@ jobs:
         with:
           arguments: contractTests -PlocalDocker=true -i
 
+      - name: Set up Java version for image build
+        uses: actions/setup-java@v4
+        with:
+          java-version: 17
+          distribution: temurin
+
       - name: Get current version
         if: ${{ matrix.os == 'ubuntu-latest' }}
         shell: bash
diff --git a/appsignals-tests/images/aws-sdk/aws-sdk-v1/build.gradle.kts b/appsignals-tests/images/aws-sdk/aws-sdk-v1/build.gradle.kts
index 6ee3f0cae1..ab6010e69a 100644
--- a/appsignals-tests/images/aws-sdk/aws-sdk-v1/build.gradle.kts
+++ b/appsignals-tests/images/aws-sdk/aws-sdk-v1/build.gradle.kts
@@ -53,7 +53,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-aws-sdk-v1",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/aws-sdk/aws-sdk-v2/build.gradle.kts b/appsignals-tests/images/aws-sdk/aws-sdk-v2/build.gradle.kts
index e50f70772f..90ed794f9b 100644
--- a/appsignals-tests/images/aws-sdk/aws-sdk-v2/build.gradle.kts
+++ b/appsignals-tests/images/aws-sdk/aws-sdk-v2/build.gradle.kts
@@ -53,7 +53,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-aws-sdk-v2",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/grpc/grpc-client/build.gradle.kts b/appsignals-tests/images/grpc/grpc-client/build.gradle.kts
index 9b529bb23f..c113cb447c 100644
--- a/appsignals-tests/images/grpc/grpc-client/build.gradle.kts
+++ b/appsignals-tests/images/grpc/grpc-client/build.gradle.kts
@@ -41,7 +41,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "grpc-client",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/grpc/grpc-server/build.gradle.kts b/appsignals-tests/images/grpc/grpc-server/build.gradle.kts
index 73be8257d2..a7e0728029 100644
--- a/appsignals-tests/images/grpc/grpc-server/build.gradle.kts
+++ b/appsignals-tests/images/grpc/grpc-server/build.gradle.kts
@@ -46,7 +46,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "grpc-server",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/http-clients/apache-http-client/build.gradle.kts b/appsignals-tests/images/http-clients/apache-http-client/build.gradle.kts
index 8315cf4bdc..5ba716f7c1 100644
--- a/appsignals-tests/images/http-clients/apache-http-client/build.gradle.kts
+++ b/appsignals-tests/images/http-clients/apache-http-client/build.gradle.kts
@@ -43,7 +43,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-apache-http-client-app",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/http-clients/native-http-client/build.gradle.kts b/appsignals-tests/images/http-clients/native-http-client/build.gradle.kts
index 127a3787f9..2827da3637 100644
--- a/appsignals-tests/images/http-clients/native-http-client/build.gradle.kts
+++ b/appsignals-tests/images/http-clients/native-http-client/build.gradle.kts
@@ -42,7 +42,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-native-http-client-app",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/http-clients/netty-http-client/build.gradle.kts b/appsignals-tests/images/http-clients/netty-http-client/build.gradle.kts
index 37813f7a0a..ac481d4769 100644
--- a/appsignals-tests/images/http-clients/netty-http-client/build.gradle.kts
+++ b/appsignals-tests/images/http-clients/netty-http-client/build.gradle.kts
@@ -43,7 +43,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-netty-http-client-app",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/http-clients/spring-mvc-client/build.gradle.kts b/appsignals-tests/images/http-clients/spring-mvc-client/build.gradle.kts
index 08a644c838..4235fa0d54 100644
--- a/appsignals-tests/images/http-clients/spring-mvc-client/build.gradle.kts
+++ b/appsignals-tests/images/http-clients/spring-mvc-client/build.gradle.kts
@@ -39,7 +39,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-spring-mvc-client-app",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/http-servers/netty-server/build.gradle.kts b/appsignals-tests/images/http-servers/netty-server/build.gradle.kts
index e017e85e4d..307ab89146 100644
--- a/appsignals-tests/images/http-servers/netty-server/build.gradle.kts
+++ b/appsignals-tests/images/http-servers/netty-server/build.gradle.kts
@@ -42,7 +42,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-http-server-netty-server",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/http-servers/spring-mvc/build.gradle.kts b/appsignals-tests/images/http-servers/spring-mvc/build.gradle.kts
index e39d7ff7d6..5ed341d6f6 100644
--- a/appsignals-tests/images/http-servers/spring-mvc/build.gradle.kts
+++ b/appsignals-tests/images/http-servers/spring-mvc/build.gradle.kts
@@ -41,7 +41,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-http-server-spring-mvc",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/http-servers/tomcat/build.gradle.kts b/appsignals-tests/images/http-servers/tomcat/build.gradle.kts
index a97ed1ab6c..1ff2464e5b 100644
--- a/appsignals-tests/images/http-servers/tomcat/build.gradle.kts
+++ b/appsignals-tests/images/http-servers/tomcat/build.gradle.kts
@@ -44,7 +44,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-http-server-tomcat",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/jdbc/build.gradle.kts b/appsignals-tests/images/jdbc/build.gradle.kts
index 983992c7cb..073f6d4c40 100644
--- a/appsignals-tests/images/jdbc/build.gradle.kts
+++ b/appsignals-tests/images/jdbc/build.gradle.kts
@@ -45,7 +45,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-jdbc-app",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/kafka/kafka-consumers/build.gradle.kts b/appsignals-tests/images/kafka/kafka-consumers/build.gradle.kts
index 29fc199788..91ef8a7528 100644
--- a/appsignals-tests/images/kafka/kafka-consumers/build.gradle.kts
+++ b/appsignals-tests/images/kafka/kafka-consumers/build.gradle.kts
@@ -47,7 +47,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-kafka-kafka-consumers",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/kafka/kafka-producers/build.gradle.kts b/appsignals-tests/images/kafka/kafka-producers/build.gradle.kts
index ffc26bb0c2..a7e0b98f08 100644
--- a/appsignals-tests/images/kafka/kafka-producers/build.gradle.kts
+++ b/appsignals-tests/images/kafka/kafka-producers/build.gradle.kts
@@ -47,7 +47,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-tests-kafka-kafka-producers",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/appsignals-tests/images/mock-collector/build.gradle.kts b/appsignals-tests/images/mock-collector/build.gradle.kts
index 5b9883299c..16c1715b81 100644
--- a/appsignals-tests/images/mock-collector/build.gradle.kts
+++ b/appsignals-tests/images/mock-collector/build.gradle.kts
@@ -42,7 +42,7 @@ tasks {
 }
 jib {
   configureImages(
-    "public.ecr.aws/docker/library/amazoncorretto:17-alpine",
+    "public.ecr.aws/docker/library/amazoncorretto:21-alpine",
     "aws-appsignals-mock-collector",
     localDocker = rootProject.property("localDocker")!! == "true",
     multiPlatform = false,
diff --git a/scripts/docker/corretto-slim/Dockerfile b/scripts/docker/corretto-slim/Dockerfile
index b9c97e3781..5303d4d2c0 100644
--- a/scripts/docker/corretto-slim/Dockerfile
+++ b/scripts/docker/corretto-slim/Dockerfile
@@ -1,4 +1,4 @@
-FROM public.ecr.aws/docker/library/amazoncorretto:17-alpine-jdk
+FROM public.ecr.aws/docker/library/amazoncorretto:21-alpine-jdk
 
 # Copied from https://github.com/corretto/corretto-docker/blob/master/11/jre/alpine/Dockerfile
 RUN apk update && apk add binutils && jlink --endian little --release-info $JAVA_HOME/release \