diff --git a/_constraints b/_constraints
index 419aa3f..240290e 100644
--- a/_constraints
+++ b/_constraints
@@ -1,5 +1,8 @@
 <constraints>
     <hardware>
+      <physicalmemory>
+        <size unit="G">3</size>
+      </physicalmemory>
       <disk>
         <size unit="G">12</size>
       </disk>
diff --git a/vtk.changes b/vtk.changes
index 9c8343b..fff46e3 100644
--- a/vtk.changes
+++ b/vtk.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Jun 10 12:57:24 UTC 2020 - Guillaume GARDET <guillaume.gardet@opensuse.org>
+
+- Update _constraints to avoid OOM errors
+
 -------------------------------------------------------------------
 Sun May 31 20:28:03 UTC 2020 - Atri Bhattacharya <badshah400@gmail.com>