diff --git a/backend/package.json b/backend/package.json
index db6f1b2..4f10263 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -93,6 +93,7 @@
     "@types/fs-extra": "^11.0.4",
     "@types/jest": "^30.0.0",
     "@types/multer": "^2.0.0",
+    "@types/ms": "^2.1.0",
     "@types/node": "^25.5.0",
     "@types/opossum": "^8.1.9",
     "@types/passport-jwt": "^4.0.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 8f91dce..6e8738d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -244,6 +244,9 @@ importers:
       '@types/jest':
         specifier: ^30.0.0
         version: 30.0.0
+      '@types/ms':
+        specifier: ^2.1.0
+        version: 2.1.0
       '@types/multer':
         specifier: ^2.0.0
         version: 2.0.0