diff --git a/scripts/import/import_craters.php b/scripts/import/import_craters.php
index de7e465..3d960a1 100644
--- a/scripts/import/import_craters.php
+++ b/scripts/import/import_craters.php
@@ -4,6 +4,8 @@ declare(strict_types=1);
 ini_set('display_errors', '1');
 error_reporting(E_ALL);
 session_start();
+@set_time_limit(0);
+ignore_user_abort(true);
 
 $loggedIn = isset($_SESSION['user_id']);
 $pageTitle = 'Krater-Import - AstroTools';
@@ -374,6 +376,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             [
                 PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                 PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+                PDO::ATTR_EMULATE_PREPARES => false,
             ]
         );
 
@@ -491,6 +494,10 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
         $stmt = $pdo->prepare($insertSql);
         $imported = 0;
         $skipped = 0;
+        $rowsSinceCommit = 0;
+        $batchSize = 250;
+
+        $pdo->beginTransaction();
 
         while (($row = fgetcsv($handle, 0, ';', '"', '\\')) !== false) {
             if ($row === [null] || $row === false) {
@@ -586,6 +593,17 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
 
             $stmt->execute($payload);
             $imported++;
+            $rowsSinceCommit++;
+
+            if ($rowsSinceCommit >= $batchSize) {
+                $pdo->commit();
+                $pdo->beginTransaction();
+                $rowsSinceCommit = 0;
+            }
+        }
+
+        if ($pdo->inTransaction()) {
+            $pdo->commit();
         }
 
         fclose($handle);
@@ -599,6 +617,14 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             'truncate_first' => $truncateFirst,
         ];
     } catch (Throwable $exception) {
+        if (isset($pdo) && $pdo instanceof PDO && $pdo->inTransaction()) {
+            $pdo->rollBack();
+        }
+
+        if (isset($handle) && is_resource($handle)) {
+            fclose($handle);
+        }
+
         $report = [
             'ok' => false,
             'error' => $exception->getMessage(),