diff --git a/releng/org.eclipse.ease.modules.releng/pom.xml b/releng/org.eclipse.ease.modules.releng/pom.xml
index b5b094d..cc3d8e6 100644
--- a/releng/org.eclipse.ease.modules.releng/pom.xml
+++ b/releng/org.eclipse.ease.modules.releng/pom.xml
@@ -11,10 +11,10 @@
 		<tycho.version>1.0.0</tycho.version>
 		<tycho.extras.version>${tycho.version}</tycho.extras.version>
 		<maven.compiler.version>3.6.1</maven.compiler.version>
-		<maven.javadoc.version>2.10.4</maven.javadoc.version>
+		<maven.javadoc.version>2.9.1</maven.javadoc.version>
 		<jacoco.version>0.7.9</jacoco.version>
-		<eclipse.jarsigner.version>1.1.3</eclipse.jarsigner.version>
-		<maven.buildhelper.version>3.0.0</maven.buildhelper.version>
+		<eclipse.jarsigner.version>1.0.5</eclipse.jarsigner.version>
+		<maven.buildhelper.version>1.9.1</maven.buildhelper.version>
 
 		<!-- build parameters -->
 		<compiler.compliance>1.8</compiler.compliance>