diff --git a/strasbourg/reprise.py b/strasbourg/reprise.py
index 90967de..9ea2691 100644
--- a/strasbourg/reprise.py
+++ b/strasbourg/reprise.py
@@ -70,6 +70,11 @@ prefill = {
 }
 prefill_used = {}
 
+regexes = {
+    'Code postal': r'\d+',
+    'Téléphone': r'\d+',
+}
+
 
 def process_children(node):
     global field_id, first_fieldset
@@ -159,11 +164,18 @@ def process_children(node):
         else:
             field.required = False
 
+        if validation is not None and validation.attrib.get('type') == 'validate-integer':
+            field.validation = r'\d+'
+
         if validation is not None and validation.attrib.get('type') == 'validate-custom':
             if validation.text:
                 assert field_type == 'textinput'
                 field.validation = fix_encoding(validation.text[1:-1])
 
+        for label in regexes:
+            if field.label.startswith(label):
+                field.validation = regexes.get(label)
+
         if field_node.attrib.get('size'):
             size = field_node.attrib['size']
             assert size.endswith('px')