diff --git a/src/server/package.json b/src/server/package.json
index ea59676..86a3583 100644
--- a/src/server/package.json
+++ b/src/server/package.json
@@ -20,6 +20,7 @@
     "@types/ws": "^8.5.5",
     "body-parser": "^1.20.0",
     "express": "^4.17.3",
+    "map-stream": "0.0.7",
     "tsc-watch": "^5.0.3",
     "typescript": "^4.6.3",
     "ws": "^8.12.1"