diff --git a/README.rst b/README.rst
index c8f20ac50..74bdebb91 100644
--- a/README.rst
+++ b/README.rst
@@ -243,7 +243,7 @@ add_substitution
     message.add_substitution('key', 'value')
     
 set_substitutions
-^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^
 
 .. code:: python
 
@@ -337,9 +337,25 @@ add_filter
 
     message = sendgrid.Mail()
     message.add_filter('filter', 'setting', 'value')
+
+`ASM Group`_
+~~~~~~~~~~~~
+
+.. code:: python
+
+    message = sendgrid.Mail()
+    message.smtpapi.set_asm_group_id(value)
+
+set_asm_group_id
+^^^^^^^^^^^^^^^^
+
+.. code:: python
+
+    message = sendgrid.Mail()
+    message.set_asm_group_id(value)
     
 Using Templates from the Template Engine
-~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. code:: python
 
diff --git a/sendgrid/message.py b/sendgrid/message.py
index be4c6b81e..f0763e89c 100644
--- a/sendgrid/message.py
+++ b/sendgrid/message.py
@@ -183,5 +183,8 @@ def set_sections(self, sections):
     def add_filter(self, filterKey, setting, value):
         self.smtpapi.add_filter(filterKey, setting, value)
 
+    def set_asm_group_id(self, value):
+        self.smtpapi.set_asm_group_id(value)
+
     def json_string(self):
         return self.smtpapi.json_string()
diff --git a/test/__init__.py b/test/__init__.py
index a45accbce..aad091f49 100644
--- a/test/__init__.py
+++ b/test/__init__.py
@@ -42,6 +42,7 @@ def test_send(self):
         m.set_html('WIN')
         m.set_text('WIN')
         m.set_from('doe@email.com')
+        m.set_asm_group_id(42)
         m.add_cc('cc@email.com')
         m.add_bcc('bcc@email.com')
         m.add_substitution('subKey', 'subValue')
@@ -85,7 +86,8 @@ def test_send(self):
                             "filter": "filterValue"
                         }
                     }
-                }
+                },
+                "asm_group_id": 42
             }
             '''))
         self.assertEqual(url, test_url)