diff --git a/package-lock.json b/package-lock.json
index 7f55237..0d1b08d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "devDependencies": {
         "@seamapi/fake-seam-connect": "1.86.0",
         "@seamapi/nextlove-sdk-generator": "^1.19.10",
-        "@seamapi/types": "1.806.0",
+        "@seamapi/types": "1.809.0",
         "del": "^7.1.0",
         "prettier": "^3.2.5"
       }
@@ -535,9 +535,9 @@
       }
     },
     "node_modules/@seamapi/types": {
-      "version": "1.806.0",
-      "resolved": "https://registry.npmjs.org/@seamapi/types/-/types-1.806.0.tgz",
-      "integrity": "sha512-2GI6meyqxBYy5gx05FKzNOSQZB9QikcYtotiZie0PwIarFwZvssvjICqfIZnraOuzMOgT2AJEAXph/kp2s0vAg==",
+      "version": "1.809.0",
+      "resolved": "https://registry.npmjs.org/@seamapi/types/-/types-1.809.0.tgz",
+      "integrity": "sha512-xBrXorx5njf53vwoHSgEzXxL4Bul82kxKOzRVNs/K37VU4YcaLKQc1Q7ONuFPP/PfDSWP2pCOiRgzx99nrPiHQ==",
       "dev": true,
       "license": "MIT",
       "engines": {
diff --git a/package.json b/package.json
index c6e2be6..9205554 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "devDependencies": {
     "@seamapi/fake-seam-connect": "1.86.0",
     "@seamapi/nextlove-sdk-generator": "^1.19.10",
-    "@seamapi/types": "1.806.0",
+    "@seamapi/types": "1.809.0",
     "del": "^7.1.0",
     "prettier": "^3.2.5"
   }
diff --git a/seam/routes/access_codes.py b/seam/routes/access_codes.py
index 3022086..c72e663 100644
--- a/seam/routes/access_codes.py
+++ b/seam/routes/access_codes.py
@@ -94,7 +94,8 @@ def create_multiple(
         name: Optional[str] = None,
         prefer_native_scheduling: Optional[bool] = None,
         preferred_code_length: Optional[float] = None,
-        starts_at: Optional[str] = None
+        starts_at: Optional[str] = None,
+        use_backup_access_code_pool: Optional[bool] = None
     ) -> List[AccessCode]:
         json_payload = {}
 
@@ -124,6 +125,8 @@ def create_multiple(
             json_payload["preferred_code_length"] = preferred_code_length
         if starts_at is not None:
             json_payload["starts_at"] = starts_at
+        if use_backup_access_code_pool is not None:
+            json_payload["use_backup_access_code_pool"] = use_backup_access_code_pool
 
         res = self.client.post("/access_codes/create_multiple", json=json_payload)
 
diff --git a/seam/routes/models.py b/seam/routes/models.py
index 6e7d7e3..53a23c0 100644
--- a/seam/routes/models.py
+++ b/seam/routes/models.py
@@ -3519,7 +3519,8 @@ def create_multiple(
         name: Optional[str] = None,
         prefer_native_scheduling: Optional[bool] = None,
         preferred_code_length: Optional[float] = None,
-        starts_at: Optional[str] = None
+        starts_at: Optional[str] = None,
+        use_backup_access_code_pool: Optional[bool] = None
     ) -> List[AccessCode]:
         raise NotImplementedError()