diff --git a/vagrantSandbox/Vagrantfile b/vagrantSandbox/Vagrantfile
index 09476c10b..88f96db09 100644
--- a/vagrantSandbox/Vagrantfile
+++ b/vagrantSandbox/Vagrantfile
@@ -25,8 +25,9 @@ Vagrant.configure("2") do |config|
     #   # Use VBoxManage to customize the VM. For example to change memory:
     #     vb.customize ["modifyvm", :id, "--memory", "1024"]
     vb.cpus=nrCPU
-    # make sure each CPU has enough memory
-    vb.memory=512*(1+nrCPU)
+    # make sure each CPU has enough memory (at least 1.5 Gig)
+    vb.memory=512*[(1+nrCPU),3].max
+  end
   end
 
   # default