diff --git a/org.jdrupes.vmoperator.manager/build.gradle b/org.jdrupes.vmoperator.manager/build.gradle
index 6581051..10a122c 100644
--- a/org.jdrupes.vmoperator.manager/build.gradle
+++ b/org.jdrupes.vmoperator.manager/build.gradle
@@ -27,7 +27,7 @@ dependencies {
 
 application {
     applicationName = 'vm-manager'
-    applicationDefaultJvmArgs = ['-Xmx50m',
+    applicationDefaultJvmArgs = ['-Xmx50m', '-XX:+UseParallelGC',
         '-Djava.util.logging.manager=org.jdrupes.vmoperator.util.LongLoggingManager'
         ]
     // Define the main class for the application.