diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..999d5d0
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,13 @@
+<constraints>
+ <overwrite>
+    <conditions>
+      <arch>s390x</arch>
+      <arch>riscv64</arch>
+    </conditions>
+    <hardware>
+      <physicalmemory>
+        <size unit="G">8</size>
+      </physicalmemory>
+    </hardware>
+  </overwrite>
+</constraints>
diff --git a/ghc-aeson.changes b/ghc-aeson.changes
index 2fcc24f..997d6fe 100644
--- a/ghc-aeson.changes
+++ b/ghc-aeson.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Oct  4 18:06:49 UTC 2020 - Ondřej Súkup <mimi.vx@gmail.com>
+
+- add constraints for s390x and riscv64
+
 -------------------------------------------------------------------
 Mon Aug 31 02:02:42 UTC 2020 - psimons@suse.com