diff --git a/eopayment/paybox.py b/eopayment/paybox.py
index fdb7322..a9f921d 100644
--- a/eopayment/paybox.py
+++ b/eopayment/paybox.py
@@ -240,7 +240,7 @@ class Payment(PaymentCommon):
                 'caption': _('Numéro de rang'),
                 'required': True,
                 'validation': lambda x: isinstance(x, six.string_types)
-                and x.isdigit() and len(x) == 2,
+                and x.isdigit() and len(x) == 3,
             },
             {
                 'name': 'identifiant',
@@ -312,7 +312,7 @@ class Payment(PaymentCommon):
     def request(self, amount, email, name=None, orderid=None, manual_validation=None, **kwargs):
         d = OrderedDict()
         d['PBX_SITE'] = force_text(self.site)
-        d['PBX_RANG'] = force_text(self.rang).strip()[-2:]
+        d['PBX_RANG'] = force_text(self.rang).strip()[-3:]
         d['PBX_IDENTIFIANT'] = force_text(self.identifiant)
         d['PBX_TOTAL'] = self.clean_amount(amount)
         d['PBX_DEVISE'] = force_text(self.devise)
diff --git a/tests/test_paybox.py b/tests/test_paybox.py
index 750dc37..7beb3f9 100644
--- a/tests/test_paybox.py
+++ b/tests/test_paybox.py
@@ -93,7 +93,7 @@ class PayboxTests(TestCase):
         self.assertEqual(root.attrib['method'], 'POST')
         self.assertEqual(root.attrib['action'], paybox.URLS['test'])
         expected_form_values = {
-            'PBX_RANG': '01',
+            'PBX_RANG': '001',
             'PBX_SITE': '12345678',
             'PBX_IDENTIFIANT': '12345678',
             'PBX_RETOUR': (
@@ -108,9 +108,9 @@ class PayboxTests(TestCase):
             'PBX_DEVISE': '978',
             'PBX_HASH': 'SHA512',
             'PBX_HMAC': (
-                '300CFBDFF0454403BE7FEA11B9714C6B134294313E'
-                '7A052580F517BFCB117FB6A175C2E0DC81F6137D95'
-                '8FCA3CC4F8F1883A479C474C3A7B871CCA2DB8D033D9'
+                'A9F561A6EA79390F1741A6B72872470BC1A1688E4581'
+                'F097EC80B99D2038413AB350F2F5429FFA4F8D426D99'
+                'B72E038164642F6F9BA10D46837EE486EEB944A2'
             ),
             'PBX_ARCHIVAGE': '20160216',
             'PBX_REPONDRE_A': 'http://example.com/callback',