diff --git a/_constraints b/_constraints
index 999d5d0..a774c18 100644
--- a/_constraints
+++ b/_constraints
@@ -1,4 +1,9 @@
 <constraints>
+  <hardware>
+    <memory>
+      <size unit="G">5</size>
+    </memory>
+  </hardware>
  <overwrite>
     <conditions>
       <arch>s390x</arch>
diff --git a/ghc-aeson.changes b/ghc-aeson.changes
index c5b71ec..0e3d53b 100644
--- a/ghc-aeson.changes
+++ b/ghc-aeson.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu May  6 06:49:35 UTC 2021 - Guillaume GARDET <guillaume.gardet@opensuse.org>
+
+- Set memory constraints to avoid OOM
+
 -------------------------------------------------------------------
 Tue Mar 23 14:56:10 UTC 2021 - psimons@suse.com