diff --git a/embedded/openapi/fixtures3.json b/embedded/openapi/fixtures3.json
index 8a6daf40..561c151a 100644
--- a/embedded/openapi/fixtures3.json
+++ b/embedded/openapi/fixtures3.json
@@ -834,7 +834,8 @@
           },
           "routing_number": "110000000",
           "status_details": {}
-        }
+        },
+        "customer": null
       },
       "return_url": "https://example.com/return",
       "setup_future_usage": "off_session",
diff --git a/embedded/openapi/spec3.beta.sdk.json b/embedded/openapi/spec3.beta.sdk.json
index 7e53e23e..5a4a6389 100644
--- a/embedded/openapi/spec3.beta.sdk.json
+++ b/embedded/openapi/spec3.beta.sdk.json
@@ -10003,6 +10003,26 @@
           "cashapp": {
             "$ref": "#/components/schemas/payment_method_cashapp"
           },
+          "customer": {
+            "anyOf": [
+              {
+                "maxLength": 5000,
+                "type": "string"
+              },
+              {
+                "$ref": "#/components/schemas/customer"
+              }
+            ],
+            "description": "The ID of the Customer to which this PaymentMethod is saved. This will not be set when the PaymentMethod has not been saved to a Customer.",
+            "nullable": true,
+            "x-expansionResources": {
+              "oneOf": [
+                {
+                  "$ref": "#/components/schemas/customer"
+                }
+              ]
+            }
+          },
           "customer_balance": {
             "$ref": "#/components/schemas/payment_method_customer_balance"
           },
@@ -10138,6 +10158,7 @@
         },
         "required": [
           "billing_details",
+          "customer",
           "type"
         ],
         "title": "ConfirmationTokensResourcePaymentMethodPreview",
@@ -10157,6 +10178,7 @@
           "card",
           "card_present",
           "cashapp",
+          "customer",
           "customer_balance",
           "eps",
           "fpx",
diff --git a/embedded/openapi/spec3.json b/embedded/openapi/spec3.json
index de127027..5df03474 100644
--- a/embedded/openapi/spec3.json
+++ b/embedded/openapi/spec3.json
@@ -7076,6 +7076,26 @@
           "cashapp": {
             "$ref": "#/components/schemas/payment_method_cashapp"
           },
+          "customer": {
+            "anyOf": [
+              {
+                "maxLength": 5000,
+                "type": "string"
+              },
+              {
+                "$ref": "#/components/schemas/customer"
+              }
+            ],
+            "description": "The ID of the Customer to which this PaymentMethod is saved. This will not be set when the PaymentMethod has not been saved to a Customer.",
+            "nullable": true,
+            "x-expansionResources": {
+              "oneOf": [
+                {
+                  "$ref": "#/components/schemas/customer"
+                }
+              ]
+            }
+          },
           "customer_balance": {
             "$ref": "#/components/schemas/payment_method_customer_balance"
           },
@@ -7222,6 +7242,7 @@
           "card",
           "card_present",
           "cashapp",
+          "customer",
           "customer_balance",
           "eps",
           "fpx",