diff --git a/pom.xml b/pom.xml
index 9bfa41131..bd8123e63 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@
 		<java.version>1.8</java.version>
 		<maven.compiler.source>${java.version}</maven.compiler.source>
 		<maven.compiler.target>${java.version}</maven.compiler.target>
-		<wrapper.version>1.0.21.RELEASE</wrapper.version>
+		<wrapper.version>1.0.27.BUILD-SNAPSHOT</wrapper.version>
 		<docs.main>spring-cloud-function</docs.main>
 		<maven-checkstyle-plugin.failsOnError>true</maven-checkstyle-plugin.failsOnError>
 		<maven-checkstyle-plugin.failsOnViolation>true
diff --git a/spring-cloud-function-kotlin/pom.xml b/spring-cloud-function-kotlin/pom.xml
index 8cfdae9ed..c1d19bd88 100644
--- a/spring-cloud-function-kotlin/pom.xml
+++ b/spring-cloud-function-kotlin/pom.xml
@@ -72,6 +72,7 @@
 					<compilerPlugins>
 						<plugin>spring</plugin>
 					</compilerPlugins>
+					<jvmTarget>1.8</jvmTarget>
 				</configuration>
 				<executions>
 					<execution>
@@ -84,6 +85,7 @@
 								<sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
 								<sourceDir>${project.basedir}/src/test/java</sourceDir>
 							</sourceDirs>
+							<jvmTarget>1.8</jvmTarget>
 						</configuration>
 					</execution>
 				</executions>