diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c77c8d0..13250f1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,6 +17,7 @@ jobs:
   lint:
     name: Lint
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -49,6 +50,7 @@ jobs:
   typecheck:
     name: Type Check
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -78,6 +80,7 @@ jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
+    timeout-minutes: 15
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -107,6 +110,7 @@ jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     needs: [lint, typecheck, test]
     steps:
       - name: Checkout
@@ -146,6 +150,7 @@ jobs:
   accessibility:
     name: Accessibility Audit
     runs-on: ubuntu-latest
+    timeout-minutes: 30
     needs: build
     steps:
       - name: Checkout
@@ -224,6 +229,7 @@ jobs:
   security:
     name: Security Scan
     runs-on: ubuntu-latest
+    timeout-minutes: 10
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
diff --git a/vitest.config.ts b/vitest.config.ts
index a2a102f..9937681 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -13,7 +13,7 @@ export default defineConfig({
     setupFiles: ['./src/test/setup.ts'],
     include: ['src/**/*.{test,spec}.{ts,tsx}'],
     testTimeout: 10_000,
-    maxWorkers: Math.max(1, Math.floor(cpuCount / 2)),
+    maxWorkers: process.env.CI ? 2 : Math.max(1, Math.floor(cpuCount / 2)),
     coverage: {
       provider: 'v8',
       reporter: ['text', 'json', 'html'],