diff --git a/pregelix-api/pom.xml b/pregelix-api/pom.xml
index 66a0186..2caa93b 100644
--- a/pregelix-api/pom.xml
+++ b/pregelix-api/pom.xml
@@ -41,6 +41,7 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-clean-plugin</artifactId>
+				<version>2.5</version>
 				<configuration>
 					<filesets>
 						<fileset>