diff --git a/backend/package.json b/backend/package.json
index b18c6d0..6697128 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -40,7 +40,7 @@
   "devDependencies": {
     "@prisma/client": "^7.8.0",
     "@types/cors": "^2.8.19",
-    "@types/eventsource": "^1.1.15",
+    "@types/eventsource": "^3.0.0",
     "@types/express": "^5.0.6",
     "@types/node": "^25.2.3",
     "@types/pg": "^8.20.0",