diff --git a/src/proxy/queue.ts b/src/proxy/queue.ts
index c88da7f..3a198f7 100644
--- a/src/proxy/queue.ts
+++ b/src/proxy/queue.ts
@@ -30,10 +30,10 @@ import { sendErrorToClient } from "./middleware/response/error-generator";
 const queue: Request[] = [];
 const log = logger.child({ module: "request-queue" });
 
-/** Maximum number of queue slots for Agnai.chat requests. */
-const AGNAI_CONCURRENCY_LIMIT = 5;
 /** Maximum number of queue slots for individual users. */
-const USER_CONCURRENCY_LIMIT = 1;
+const USER_CONCURRENCY_LIMIT = parseInt(process.env.USER_CONCURRENCY_LIMIT ?? "1");
+/** Maximum number of queue slots for Agnai.chat requests. */
+const AGNAI_CONCURRENCY_LIMIT = USER_CONCURRENCY_LIMIT * 5;
 const MIN_HEARTBEAT_SIZE = parseInt(process.env.MIN_HEARTBEAT_SIZE_B ?? "512");
 const MAX_HEARTBEAT_SIZE =
   1024 * parseInt(process.env.MAX_HEARTBEAT_SIZE_KB ?? "1024");