diff --git a/includes/posts-save.php b/includes/posts-save.php
new file mode 100644
index 0000000..50ea7d6
--- /dev/null
+++ b/includes/posts-save.php
@@ -0,0 +1,17 @@
+<?php
+
+
+function handle_posts_numerotation_remapping_on_save()
+{
+	$post_type = get_post_type();
+
+	$numerotated_post_types = array('analyses-etudes', 'expositions', 'outils-pedagogiques', 'recherches');
+	// Ne s'exécuter que dans l'admin pour éviter de surcharger le frontend
+	if (!is_admin() || !in_array($post_type, $numerotated_post_types)) {
+		return;
+	}
+	handle_posts_numerotation_remapping($post_type);
+}
+
+add_action('save_post', 'handle_posts_numerotation_remapping_on_save');
+add_action('delete_post', 'handle_posts_numerotation_remapping_on_save');
diff --git a/includes/utilities.php b/includes/utilities.php
index 66d9177..9cc87bf 100644
--- a/includes/utilities.php
+++ b/includes/utilities.php
@@ -62,6 +62,29 @@ function get_archive_page_subtitle_html($post_type)
 			return '';
 	}
 }
+
+
+function handle_posts_numerotation_remapping($post_type)
+{
+	if (!is_admin()) {
+		return;
+	}
+
+	$query = new WP_Query(array(
+		'post_type' => $post_type,
+		'posts_per_page' => -1,
+		'orderby' => 'date',
+		'order' => 'ASC',
+	));
+	$numerotation = 0;
+	while ($query->have_posts()) {
+		$query->the_post();
+		$numerotation++;
+		update_post_meta(get_the_ID(), 'post_numerotation', $numerotation);
+	}
+}
+
+
 function hasPostTypeNumerotation($post_type)
 {
 	switch ($post_type) {