diff --git a/.stats.yml b/.stats.yml
index a9fd9444..c9a15c8a 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 103
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-979330185e8fda7b2bc2440075fe81c66132fc87ff3c548e93dd05db35ba3172.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/orb%2Forb-e3aeba4569f0d304b27804cc2cdd9888f3f58628fe426e206ab49e164e5417bd.yml
diff --git a/src/resources/subscriptions.ts b/src/resources/subscriptions.ts
index b00e4ecf..5d7a1a1a 100644
--- a/src/resources/subscriptions.ts
+++ b/src/resources/subscriptions.ts
@@ -15047,7 +15047,7 @@ export interface SubscriptionListParams extends PageParams {
 
   customer_id?: Array<string> | null;
 
-  external_customer_id?: string | null;
+  external_customer_id?: Array<string> | null;
 
   status?: 'active' | 'ended' | 'upcoming' | null;
 }
diff --git a/tests/api-resources/subscriptions.test.ts b/tests/api-resources/subscriptions.test.ts
index 38ad206f..f75454c7 100644
--- a/tests/api-resources/subscriptions.test.ts
+++ b/tests/api-resources/subscriptions.test.ts
@@ -60,7 +60,7 @@ describe('resource subscriptions', () => {
           'created_at[lte]': '2019-12-27T18:11:19.117Z',
           cursor: 'cursor',
           customer_id: ['string'],
-          external_customer_id: 'external_customer_id',
+          external_customer_id: ['string'],
           limit: 1,
           status: 'active',
         },