diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index 2ca1e72..1cb4afd 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Feb 26 15:45:19 UTC 2016 - astieger@suse.com
+
+- adjust _constraints to current peak build memory and disk usage
+
 -------------------------------------------------------------------
 Sat Feb 13 08:32:09 UTC 2016 - wr@rosenauer.org
 
diff --git a/_constraints b/_constraints
index ca61b24..4ee7c91 100644
--- a/_constraints
+++ b/_constraints
@@ -2,10 +2,10 @@
 <constraints>
   <hardware>
     <disk>
-      <size unit="G">9</size>
+      <size unit="G">11</size>
     </disk>
     <memory>
-      <size unit="M">3800</size>
+      <size unit="M">6000</size>
     </memory>
   </hardware>
 </constraints>