diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9ea9116..290b402 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,13 +13,13 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+                node-version: 18.19.0
 
       - name: Install bun
-        run: npm install --global bun
+        run: bun install --global bun
 
       - name: Install dependencies
         run: bun install
 
       - name: Run test
-        run: bun run test
+        run: bun run test:e2e
diff --git a/app.ts b/app.ts
index 4e0d5ba..c62b23e 100644
--- a/app.ts
+++ b/app.ts
@@ -1,4 +1,5 @@
 import startServer, { server } from "./server";
+import 'ajv/dist/core';
 
 startServer().catch(console.error);
 
diff --git a/package.json b/package.json
index 86afd94..f87e3c8 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "test:server": "NODE_DEVELOPMENT=test bun run app.ts",
     "test:e2e": "wait-on -l tcp:3000 && stepci run workflow.yml",
     "generate": "stepci generate ./specs/openapi.yaml ./specs/generated.yaml",
+    "preinstall": "npm install ajv@^8.6.0",
     "start": "bun app.ts",
     "start:prod": "node dist/app.js",
     "test": "bunx vitest run",