diff --git a/moto/apigateway/utils.py b/moto/apigateway/utils.py
index 6d1e6ef19..31f8060b0 100644
--- a/moto/apigateway/utils.py
+++ b/moto/apigateway/utils.py
@@ -1,9 +1,10 @@
 from __future__ import unicode_literals
 import six
 import random
+import string
 
 
 def create_id():
     size = 10
-    chars = list(range(10)) + ['A-Z']
+    chars = list(range(10)) + list(string.ascii_lowercase)
     return ''.join(six.text_type(random.choice(chars)) for x in range(size))