diff --git a/app/package.json b/app/package.json
index c58e555..e6f4a0a 100644
--- a/app/package.json
+++ b/app/package.json
@@ -66,6 +66,7 @@
         "ts-proto": "^2.10.1",
         "urdf-loader": "^0.12.6",
         "uzip": "^0.20201231.0",
+        "ws": "^8.18.3",
         "xacro-parser": "^0.3.10"
     },
     "packageManager": "pnpm@9.3.0"
diff --git a/app/pnpm-lock.yaml b/app/pnpm-lock.yaml
index 6b9250c..96dd72b 100644
--- a/app/pnpm-lock.yaml
+++ b/app/pnpm-lock.yaml
@@ -53,6 +53,9 @@ importers:
       uzip:
         specifier: ^0.20201231.0
         version: 0.20201231.0
+      ws:
+        specifier: ^8.18.3
+        version: 8.18.3
       xacro-parser:
         specifier: ^0.3.10
         version: 0.3.10