diff --git a/_constraints b/_constraints
index 3891a8f..9ad0967 100644
--- a/_constraints
+++ b/_constraints
@@ -2,7 +2,7 @@
 <constraints>
   <hardware>
    <disk>
-    <size unit="G">8</size>
+    <size unit="G">7</size>
    </disk>
    <physicalmemory>
     <size unit="M">10000</size>