diff --git a/crates/gateway/src/main.rs b/crates/gateway/src/main.rs
index 722c098..e9fdd3e 100644
--- a/crates/gateway/src/main.rs
+++ b/crates/gateway/src/main.rs
@@ -190,7 +190,7 @@ async fn main() {
     }
 
     app = app
-        .layer(DefaultBodyLimit::max(256 * 1024 * 1024)) // 256MB
+        .layer(DefaultBodyLimit::max(512 * 1024 * 1024)) // 512MB — supports 500K worker CSV
         .layer(CorsLayer::new()
             .allow_origin(Any)
             .allow_methods(Any)