diff --git a/htdocs/compta/bank/graph.php b/htdocs/compta/bank/graph.php
index 8d2b44c40af..97e362145ae 100644
--- a/htdocs/compta/bank/graph.php
+++ b/htdocs/compta/bank/graph.php
@@ -2,6 +2,7 @@
 /* Copyright (C) 2005      Rodolphe Quiedeville <rodolphe@quiedeville.org>
  * Copyright (C) 2004-2010 Laurent Destailleur  <eldy@users.sourceforge.net>
  * Copyright (C) 2005-2009 Regis Houssin        <regis.houssin@inodbox.com>
+ * Copyright (C) 2024		MDW							<mdeweerd@users.noreply.github.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -125,12 +126,14 @@ if ($result < 0) {
 		// Loading table $amounts
 		$amounts = array();
 
-		$monthnext = $month + 1;
-		$yearnext = $year;
+		$monthnext = (int) $month + 1;
+		$yearnext = (int) $year;
 		if ($monthnext > 12) {
 			$monthnext = 1;
 			$yearnext++;
 		}
+		$monthnext = sprintf('%02d', $monthnext);
+		$yearnext = sprintf('%04d', $yearnext);
 
 		$sql = "SELECT date_format(b.datev,'%Y%m%d')";
 		$sql .= ", SUM(b.amount)";
@@ -534,12 +537,14 @@ if ($result < 0) {
 		$credits = array();
 		$debits = array();
 
-		$monthnext = $month + 1;
-		$yearnext = $year;
+		$monthnext = (int) $month + 1;
+		$yearnext = (int) $year;
 		if ($monthnext > 12) {
 			$monthnext = 1;
 			$yearnext++;
 		}
+		$monthnext = sprintf('%02d', $monthnext);
+		$yearnext = sprintf('%04d', $yearnext);
 
 		$sql = "SELECT date_format(b.datev,'%d')";
 		$sql .= ", SUM(b.amount)";
@@ -569,12 +574,14 @@ if ($result < 0) {
 			dol_print_error($db);
 		}
 
-		$monthnext = $month + 1;
-		$yearnext = $year;
+		$monthnext = (int) $month + 1;
+		$yearnext = (int) $year;
 		if ($monthnext > 12) {
 			$monthnext = 1;
 			$yearnext++;
 		}
+		$monthnext = sprintf('%02d', $monthnext);
+		$yearnext = sprintf('%04d', $yearnext);
 
 		$sql = "SELECT date_format(b.datev,'%d')";
 		$sql .= ", SUM(b.amount)";
@@ -805,10 +812,10 @@ print '</table>';
 
 // Graphs
 if ($mode == 'standard') {
-	$prevyear = $year;
-	$nextyear = $year;
-	$prevmonth = $month - 1;
-	$nextmonth = $month + 1;
+	$prevyear = (int) $year;
+	$nextyear = (int) $year;
+	$prevmonth = (int) $month - 1;
+	$nextmonth = (int) $month + 1;
 	if ($prevmonth < 1) {
 		$prevmonth = 12;
 		$prevyear--;
@@ -817,6 +824,10 @@ if ($mode == 'standard') {
 		$nextmonth = 1;
 		$nextyear++;
 	}
+	$nextmonth = sprintf('%02d', $nextmonth);
+	$prevmonth = sprintf('%02d', $prevmonth);
+	$nextyear = sprintf('%04d', $nextyear);
+	$prevyear = sprintf('%04d', $prevyear);
 
 	// For month
 	$link = "<a href='".$_SERVER["PHP_SELF"]."?account=".$account.(GETPOST("option") != 'all' ? '' : '&option=all')."&year=".$prevyear."&month=".$prevmonth."'>".img_previous('', 'class="valignbottom"')."</a> ".$langs->trans("Month")." <a href='".$_SERVER["PHP_SELF"]."?account=".$account.(GETPOST("option") != 'all' ? '' : '&option=all')."&year=".$nextyear."&month=".$nextmonth."'>".img_next('', 'class="valignbottom"')."</a>";
@@ -832,8 +843,10 @@ if ($mode == 'standard') {
 	print '</div>';
 
 	// For year
-	$prevyear = $year - 1;
-	$nextyear = $year + 1;
+	$prevyear = (int) $year - 1;
+	$nextyear = (int) $year + 1;
+	$nextyear = sprintf('%04d', $nextyear);
+	$prevyear = sprintf('%04d', $prevyear);
 	$link = "<a href='".$_SERVER["PHP_SELF"]."?account=".$account.(GETPOST("option") != 'all' ? '' : '&option=all')."&year=".($prevyear)."'>".img_previous('', 'class="valignbottom"')."</a> ".$langs->trans("Year")." <a href='".$_SERVER["PHP_SELF"]."?account=".$account.(GETPOST("option") != 'all' ? '' : '&option=all')."&year=".($nextyear)."'>".img_next('', 'class="valignbottom"')."</a>";
 
 	print '<div class="right clearboth margintoponly">'.$link.'</div>';