diff --git a/src/index.js b/src/index.js
index 274b7718..3ad9d826 100644
--- a/src/index.js
+++ b/src/index.js
@@ -603,14 +603,16 @@ export default class Client {
     user_licenses,
     big_dev,
     format = null,
-    country_code = null
+    country_code = null,
+    agency_site
   ) {
     const query = {
       plan,
       storage,
       environments,
       user_licenses,
-      big_dev
+      big_dev,
+      agency_site
     };
     if (format) query.format = format;
     if (country_code) query.country_code = country_code;
diff --git a/src/model/Subscription.js b/src/model/Subscription.js
index 0c766fdc..c3286f3f 100644
--- a/src/model/Subscription.js
+++ b/src/model/Subscription.js
@@ -19,7 +19,13 @@ const creatableField = [
   "default_branch"
 ];
 
-const modifiableField = ["plan", "environments", "storage", "big_dev"];
+const modifiableField = [
+  "plan",
+  "environments",
+  "storage",
+  "big_dev",
+  "agency_site"
+];
 
 const url = "/v1/subscriptions/:id";
 const STATUS_ACTIVE = "active";