diff --git a/_constraints b/_constraints
index e6e3811..b6f2ae7 100644
--- a/_constraints
+++ b/_constraints
@@ -9,7 +9,7 @@
 			<size unit="G">18</size>
 		</disk>
 		<physicalmemory>
-			<size unit="G">16</size>
+			<size unit="G">21</size>
 		</physicalmemory>
 	</hardware>
 </constraints>