diff --git a/start-6001-to-16000m.sh b/start-6001-to-16000m.sh
index 78a08d6..91efca8 100644
--- a/start-6001-to-16000m.sh
+++ b/start-6001-to-16000m.sh
@@ -33,7 +33,7 @@ fi
 # Limits Java JVM stack size and maximum heap usage.
 # Comment out for bigger systems, e.g. non-routers
 # or when API documentation is enabled
-JVM_MEMORY_ARGS="-Xss1256k -Xmx3200m"
+JVM_MEMORY_ARGS="-Xss1556k -Xmx4400m"
 
 # Although java.net.preferIPv4Stack is supposed to be false
 # by default in Java 11, on some platforms (e.g. FreeBSD 12),