diff --git a/services/backend/package.json b/services/backend/package.json
index 7dd586a2..88ee61e7 100644
--- a/services/backend/package.json
+++ b/services/backend/package.json
@@ -2,16 +2,22 @@
   "name": "discord-moderation-backend",
   "version": "1.0.0",
   "description": "Backend service for Discord moderation monitoring",
+  "private": true,
   "type": "module",
   "main": "dist/index.js",
+  "packageManager": "pnpm@11.20.0",
+  "engines": {
+    "node": ">=22.12.0",
+    "pnpm": ">=9.0.0"
+  },
   "scripts": {
-    "dev": "tsx watch src/index.ts",
-    "start": "node dist/index.js",
     "build": "tsc",
-    "typecheck": "tsc --noEmit",
-    "lint": "biome check --diagnostic-level=error .",
+    "dev": "tsx watch src/index.ts",
     "format": "biome format --write .",
-    "test": "vitest run"
+    "lint": "biome check --diagnostic-level=error .",
+    "start": "node dist/index.js",
+    "test": "vitest run",
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "@discordjs/voice": "^0.19.2",
@@ -29,13 +35,13 @@
     "zod": "^4.5.4"
   },
   "devDependencies": {
-    "@biomejs/biome": "latest",
+    "@biomejs/biome": "^2.5.12",
     "@types/express": "^5.0.6",
     "@types/node": "^26.4.1",
     "@types/pg": "^8.23.1",
     "@types/ws": "^8.18.1",
     "tsx": "^4.23.13",
     "typescript": "^7.0.2",
-    "vitest": "latest"
+    "vitest": "^5.0.0"
   }
 }
diff --git a/services/backend/pnpm-lock.yaml b/services/backend/pnpm-lock.yaml
index 5e61f56a..1321a015 100644
--- a/services/backend/pnpm-lock.yaml
+++ b/services/backend/pnpm-lock.yaml
@@ -49,7 +49,7 @@ importers:
         version: 4.5.4
     devDependencies:
       '@biomejs/biome':
-        specifier: latest
+        specifier: ^2.5.12
         version: 2.5.12
       '@types/express':
         specifier: ^5.0.6
@@ -70,7 +70,7 @@ importers:
         specifier: ^7.0.2
         version: 7.0.2
       vitest:
-        specifier: latest
+        specifier: ^5.0.0
         version: 5.0.0(@opentelemetry/api@1.9.1)(@types/node@26.4.1)(vite@8.2.0(@types/node@26.4.1)(esbuild@0.28.2)(tsx@4.23.13))
 
 packages: