diff --git a/services/vpn/oas_commit b/services/vpn/oas_commit
index 05026c103..c5ebfd82e 100644
--- a/services/vpn/oas_commit
+++ b/services/vpn/oas_commit
@@ -1 +1 @@
-91111d4871a604207235ce0835c7840677bda134
+ede687fbd6cfc05a7df43d36a45e168d1f109ca1
diff --git a/services/vpn/src/stackit/vpn/models/bgp_gateway_config.py b/services/vpn/src/stackit/vpn/models/bgp_gateway_config.py
index c60a82be4..e2ac02bba 100644
--- a/services/vpn/src/stackit/vpn/models/bgp_gateway_config.py
+++ b/services/vpn/src/stackit/vpn/models/bgp_gateway_config.py
@@ -27,8 +27,7 @@ class BGPGatewayConfig(BaseModel):
     BGP configuration effects all connections. (only for routingMode=BGP_ROUTE_BASED)
     """  # noqa: E501
 
-    local_asn: Optional[Annotated[int, Field(le=4294967294, strict=True, ge=64512)]] = Field(
-        default=None,
+    local_asn: Annotated[int, Field(le=4294967294, strict=True, ge=64512)] = Field(
         description="ASN for private use (reserved by IANA), both 16Bit and 32Bit ranges are valid (RFC 6996). ",
         alias="localAsn",
     )