diff --git a/spring-cloud-gcp-samples/spring-cloud-gcp-security-firebase-sample/pom.xml b/spring-cloud-gcp-samples/spring-cloud-gcp-security-firebase-sample/pom.xml
index 20ec0e3fa7..8be593ee9c 100644
--- a/spring-cloud-gcp-samples/spring-cloud-gcp-security-firebase-sample/pom.xml
+++ b/spring-cloud-gcp-samples/spring-cloud-gcp-security-firebase-sample/pom.xml
@@ -13,7 +13,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>17</java.version>
     </properties>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/pom.xml b/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/pom.xml
index e38cb48a55..5a9bfcb7a1 100644
--- a/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/pom.xml
+++ b/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/pom.xml
@@ -17,7 +17,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>17</java.version>
     </properties>
 
     <!-- The Spring Framework on Google Cloud BOM will manage spring-cloud-gcp version numbers for you. -->
diff --git a/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/src/main/appengine/app.yaml b/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/src/main/appengine/app.yaml
index a1b816909d..f451a23160 100644
--- a/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/src/main/appengine/app.yaml
+++ b/spring-cloud-gcp-samples/spring-cloud-gcp-security-iap-sample/src/main/appengine/app.yaml
@@ -1,4 +1,4 @@
-runtime: java11
+runtime: java17
 instance_class: F1
 
 env_variables: