diff --git a/domains/kou.json b/domains/kou.json
index 8663dce9b0..f025125648 100644
--- a/domains/kou.json
+++ b/domains/kou.json
@@ -12,8 +12,8 @@
       "185.199.111.153"
     ],
     "MX": [
-      "10 mx1.improvmx.com",
-      "20 mx2.improvmx.com"
+      "mx1.improvmx.com",
+      "mx2.improvmx.com"
     ],
     "TXT": [
       "v=spf1 include:spf.improvmx.com ~all"