diff --git a/src/middleware/web-incoming.ts b/src/middleware/web-incoming.ts
index 38ea4d3..04bd6c0 100644
--- a/src/middleware/web-incoming.ts
+++ b/src/middleware/web-incoming.ts
@@ -154,6 +154,10 @@ const stream = defineProxyMiddleware(
           server.emit("end", req, res, proxyRes);
         }
       } else {
+        // EventSource close
+        res.on("close", function () {
+          proxyRes.destroy();
+        });
         // Allow us to listen when the proxy has completed
         proxyRes.on("end", function () {
           if (server) {