diff --git a/Form/Extension/PostTextNumberExtension.php b/Form/Extension/PostTextNumberExtension.php
index 730d180f0..7501fbc67 100644
--- a/Form/Extension/PostTextNumberExtension.php
+++ b/Form/Extension/PostTextNumberExtension.php
@@ -19,6 +19,8 @@
 
 namespace Chill\CustomFieldsBundle\Form\Extension;
 
+use Symfony\Component\Form\Extension\Core\Type\NumberType;
+
 /**
  * This class add the PostTextExtension to number fields
  *
@@ -28,7 +30,7 @@ class PostTextNumberExtension extends PostTextExtension
 {
     public function getExtendedType()
     {
-        return PostTextNumberExtension::class;
+        return NumberType::class;
     }
 
 }
diff --git a/Resources/config/services.yml b/Resources/config/services.yml
index 805b84887..351cbd907 100644
--- a/Resources/config/services.yml
+++ b/Resources/config/services.yml
@@ -50,16 +50,15 @@ services:
         tags:
             - { name: 'chill.custom_field', type: 'number' }
             
-    # no more used in symfony 3.x
-    # chill.form_extension.post_text_integer:
-    #     class: Chill\CustomFieldsBundle\Form\Extension\PostTextIntegerExtension
-    #     tags:
-    #         - { name: form.type_extension, alias: 'integer' }
+    chill.form_extension.post_text_integer:
+        class: Chill\CustomFieldsBundle\Form\Extension\PostTextIntegerExtension
+        tags:
+            - { name: form.type_extension, extended_type: Symfony\Component\Form\Extension\Core\Type\IntegerType }
 
-    # chill.form_extension.post_text_number:
-    #     class: Chill\CustomFieldsBundle\Form\Extension\PostTextNumberExtension
-    #     tags:
-    #         - { name: form.type_extension, alias: 'number' }
+    chill.form_extension.post_text_number:
+        class: Chill\CustomFieldsBundle\Form\Extension\PostTextNumberExtension
+        tags:
+            - { name: form.type_extension, extended_type: Symfony\Component\Form\Extension\Core\Type\NumberType }
 
     chill.custom_field.choice:
         class: Chill\CustomFieldsBundle\CustomFields\CustomFieldChoice