diff --git a/shopify/api_version.py b/shopify/api_version.py
index 39ae8fb8..ce3d609a 100644
--- a/shopify/api_version.py
+++ b/shopify/api_version.py
@@ -1,5 +1,6 @@
 import re
-
+import json
+from six.moves.urllib import request
 
 class InvalidVersionError(Exception):
     pass
@@ -24,11 +25,15 @@ def define_version(cls, version):
 
     @classmethod
     def define_known_versions(cls):
-        cls.define_version(Unstable())
-        cls.define_version(Release('2020-01'))
-        cls.define_version(Release('2020-04'))
-        cls.define_version(Release('2020-07'))
-        cls.define_version(Release('2020-10'))
+        req = request.urlopen("https://app.shopify.com/services/apis.json")
+        data = json.loads(req.read().decode("utf-8"))
+        for api in data['apis']:
+            if api['handle'] == 'admin':
+                for release in api['versions']:
+                    if release['handle'] == 'unstable':
+                        cls.define_version(Unstable())
+                    else:
+                        cls.define_version(Release(release['handle']))
 
     @classmethod
     def clear_defined_versions(cls):
diff --git a/test/fixtures/api_version.json b/test/fixtures/api_version.json
new file mode 100644
index 00000000..43d1354d
--- /dev/null
+++ b/test/fixtures/api_version.json
@@ -0,0 +1 @@
+{"apis":[{"handle":"admin","versions":[{"handle":"2019-04","latest_supported":false,"display_name":"2019-04 (Unsupported)","supported":true},{"handle":"2019-07","latest_supported":false,"display_name":"2019-07 (Unsupported)","supported":true},{"handle":"2019-10","latest_supported":false,"display_name":"2019-10 (Unsupported)","supported":true},{"handle":"2020-01","latest_supported":false,"display_name":"2020-01","supported":true},{"handle":"2020-04","latest_supported":false,"display_name":"2020-04","supported":true},{"handle":"2020-07","latest_supported":false,"display_name":"2020-07","supported":true},{"handle":"2020-10","latest_supported":true,"display_name":"2020-10 (Latest)","supported":true},{"handle":"2021-01","latest_supported":false,"display_name":"2021-01 (Release candidate)","supported":false},{"handle":"unstable","latest_supported":false,"display_name":"unstable","supported":false}]},{"handle":"storefront","versions":[{"handle":"2019-07","latest_supported":false,"display_name":"2019-07 (Unsupported)","supported":true},{"handle":"2019-10","latest_supported":false,"display_name":"2019-10 (Unsupported)","supported":true},{"handle":"2020-01","latest_supported":false,"display_name":"2020-01","supported":true},{"handle":"2020-04","latest_supported":false,"display_name":"2020-04","supported":true},{"handle":"2020-07","latest_supported":false,"display_name":"2020-07","supported":true},{"handle":"2020-10","latest_supported":true,"display_name":"2020-10 (Latest)","supported":true},{"handle":"2021-01","latest_supported":false,"display_name":"2021-01 (Release candidate)","supported":false},{"handle":"unstable","latest_supported":false,"display_name":"unstable","supported":false}]}]}
\ No newline at end of file
diff --git a/test/test_helper.py b/test/test_helper.py
index dfb80968..7dc8644f 100644
--- a/test/test_helper.py
+++ b/test/test_helper.py
@@ -20,6 +20,14 @@ def setUp(self):
         self.http = http_fake.TestHandler
         self.http.set_response(Exception('Bad request'))
         self.http.site = 'https://this-is-my-test-show.myshopify.com'
+        self.fake('apis',
+                  url='https://app.shopify.com/services/apis.json',
+                  method='GET',
+                  code=200,
+                  response_headers={'Content-type': 'application/json'},
+                  body=self.load_fixture('api_version'),
+                  has_user_agent=False
+                  )
 
     def load_fixture(self, name, format='json'):
         with open(os.path.dirname(__file__)+'/fixtures/%s.%s' % (name, format), 'rb') as f:
@@ -35,13 +43,10 @@ def fake(self, endpoint, **kwargs):
             extension = ""
         else:
             extension = ".%s" % (kwargs.pop('extension', 'json'))
-
-        url = "https://this-is-my-test-show.myshopify.com%s/%s%s" % (prefix, endpoint, extension)
-        try:
-           url = kwargs['url']
-        except KeyError:
-           pass
-
+        if kwargs.get('url'):
+            url = kwargs.get('url')
+        else:
+            url = "https://this-is-my-test-show.myshopify.com%s/%s%s" % (prefix, endpoint, extension)
         headers = {}
         if kwargs.pop('has_user_agent', True):
             userAgent = 'ShopifyPythonAPI/%s Python/%s' % (shopify.VERSION, sys.version.split(' ', 1)[0])