diff --git a/lib/lago/api/resources/customer.rb b/lib/lago/api/resources/customer.rb
index 489ace9..4f4e8f4 100644
--- a/lib/lago/api/resources/customer.rb
+++ b/lib/lago/api/resources/customer.rb
@@ -88,6 +88,7 @@ def whitelist_billing_configuration(billing_params)
           (billing_params || {}).slice(
             :invoice_grace_period,
             :payment_provider,
+            :payment_provider_code,
             :provider_customer_id,
             :sync,
             :sync_with_provider,
diff --git a/spec/factories/customer.rb b/spec/factories/customer.rb
index b9fde09..f38978c 100644
--- a/spec/factories/customer.rb
+++ b/spec/factories/customer.rb
@@ -22,6 +22,7 @@
       {
         invoice_grace_period: 3,
         payment_provider: 'stripe',
+        payment_provider_code: 'stripe-eu-1',
         provider_customer_id: 'cus_123456',
         sync_with_provider: true,
         document_locale: 'fr',
diff --git a/spec/fixtures/api/customer.json b/spec/fixtures/api/customer.json
index 2992bc5..a359d53 100644
--- a/spec/fixtures/api/customer.json
+++ b/spec/fixtures/api/customer.json
@@ -24,6 +24,7 @@
     "billing_configuration": {
       "invoice_grace_period": 3,
       "payment_provider": "stripe",
+      "payment_provider_code": "stripe-eu-1",
       "provider_customer_id": "cus_12345",
       "sync_with_provider": true,
       "document_locale": "fr",
diff --git a/spec/fixtures/api/invoice.json b/spec/fixtures/api/invoice.json
index f0ad123..af942f6 100644
--- a/spec/fixtures/api/invoice.json
+++ b/spec/fixtures/api/invoice.json
@@ -63,6 +63,7 @@
       "applicable_timezone": "Europe/Paris",
       "billing_configuration": {
         "payment_provider": "stripe",
+        "payment_provider_code": "stripe-eu-1",
         "provider_customer_id": "cus_12345"
       },
       "taxes": [