diff --git a/spring-boot-samples/pom.xml b/spring-boot-samples/pom.xml
index 8e8440307c..581d5b17d6 100644
--- a/spring-boot-samples/pom.xml
+++ b/spring-boot-samples/pom.xml
@@ -153,6 +153,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-enforcer-plugin</artifactId>
+				<version>1.4</version>
 				<executions>
 					<execution>
 						<id>enforce-rules</id>
diff --git a/spring-boot-samples/spring-boot-sample-custom-layout/pom.xml b/spring-boot-samples/spring-boot-sample-custom-layout/pom.xml
index 2bf7677aa6..a07b55a7cc 100644
--- a/spring-boot-samples/spring-boot-sample-custom-layout/pom.xml
+++ b/spring-boot-samples/spring-boot-sample-custom-layout/pom.xml
@@ -41,6 +41,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-invoker-plugin</artifactId>
+				<version>1.10</version>
 				<configuration>
 					<cloneProjectsTo>${project.build.directory}/it</cloneProjectsTo>
 					<settingsFile>src/it/settings.xml</settingsFile>