diff --git a/BUILD/mdbci/templates/build.json.template b/BUILD/mdbci/templates/build.json.template
index b53ecb321..08f93905a 100644
--- a/BUILD/mdbci/templates/build.json.template
+++ b/BUILD/mdbci/templates/build.json.template
@@ -2,6 +2,7 @@
   "build" :
   {
         "hostname" : "default",
+        "memory_size" : "4096",
         "box" : "$box"
   }
 }
diff --git a/BUILD/mdbci/templates/install.json.template b/BUILD/mdbci/templates/install.json.template
index 81db5a9de..39c265c97 100644
--- a/BUILD/mdbci/templates/install.json.template
+++ b/BUILD/mdbci/templates/install.json.template
@@ -3,6 +3,7 @@
   {
         "hostname" : "maxscale",
         "box" : "$box",
+        "memory_size" : "4096",
         "product" : {
                 "name": "maxscale"
         }