diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 077f91f..24bf175 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,32 +5,41 @@ on:
     branches: [main]
   pull_request:
 
-permissions:
-  contents: read
+permissions: {}
 
 jobs:
   test:
     name: Sanity Test
     runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
-          bun-version: latest
+          persist-credentials: false
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+        with:
+          bun-version: 1.3.13
       - name: Install dependencies
-        run: bun install
+        run: bun install --frozen-lockfile
       - name: Run sanity tests
         run: bun test test/sanity.test.ts
 
   format:
     name: Format Check
     runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      contents: read
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
-          bun-version: latest
+          persist-credentials: false
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+        with:
+          bun-version: 1.3.13
       - name: Install dependencies
-        run: bun install
+        run: bun install --frozen-lockfile
       - name: Check formatting
         run: bun run format:check