diff --git a/packages/bigcommerce/src/api/endpoints/customer/get-logged-in-customer.ts b/packages/bigcommerce/src/api/endpoints/customer/get-logged-in-customer.ts
index 9076ab584..e4f7e7747 100644
--- a/packages/bigcommerce/src/api/endpoints/customer/get-logged-in-customer.ts
+++ b/packages/bigcommerce/src/api/endpoints/customer/get-logged-in-customer.ts
@@ -34,7 +34,7 @@ const getLoggedInCustomer: CustomerEndpoint['handlers']['getLoggedInCustomer'] =
         getLoggedInCustomerQuery,
         undefined,
         {
-          'Set-Cookie': `${config.customerCookie}=${token}`,
+          cookie: `${config.customerCookie}=${token}`,
         }
       )
       const { customer } = data
diff --git a/packages/bigcommerce/src/api/utils/fetch-graphql-api.ts b/packages/bigcommerce/src/api/utils/fetch-graphql-api.ts
index 9072b2432..88b44bb35 100644
--- a/packages/bigcommerce/src/api/utils/fetch-graphql-api.ts
+++ b/packages/bigcommerce/src/api/utils/fetch-graphql-api.ts
@@ -7,7 +7,7 @@ const fetchGraphqlApi: (getConfig: () => BigcommerceConfig) => GraphQLFetcher =
   async (
     query: string,
     { variables, preview } = {},
-    options: { headers?: HeadersInit } = {}
+    headers: HeadersInit  = {}
   ): Promise<any> => {
     // log.warn(query)
     const config = getConfig()
@@ -16,7 +16,7 @@ const fetchGraphqlApi: (getConfig: () => BigcommerceConfig) => GraphQLFetcher =
       method: 'POST',
       headers: {
         Authorization: `Bearer ${config.apiToken}`,
-        ...options.headers,
+        ...headers,
         'Content-Type': 'application/json',
       },
       body: JSON.stringify({