diff --git a/_constraints b/_constraints
index 768bb9f..56a268c 100644
--- a/_constraints
+++ b/_constraints
@@ -4,7 +4,17 @@
       <size unit="G">8</size>
     </disk>
     <memory>
-      <size unit="M">4000</size>
+      <size unit="G">4</size>
     </memory>
   </hardware>
+    <overwrite>
+    <conditions>
+      <arch>x86_64</arch>
+    </conditions>
+    <hardware>
+      <memory>
+        <size unit="G">12</size>
+      </memory>
+    </hardware>
+  </overwrite>
 </constraints>