diff --git a/server/hedley/modules/custom/hedley_ncda/hedley_ncda.module b/server/hedley/modules/custom/hedley_ncda/hedley_ncda.module
index 801b8f663b..fc560688be 100644
--- a/server/hedley/modules/custom/hedley_ncda/hedley_ncda.module
+++ b/server/hedley/modules/custom/hedley_ncda/hedley_ncda.module
@@ -371,7 +371,7 @@ function hedley_ncda_generate_results_data($province, $district, $sector, $cell,
 
   $data = [];
   $nid = 0;
-  $batch = 500;
+  $batch = 400;
   while (TRUE) {
     // Free up memory.
     drupal_static_reset();