diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 47cf4e0..f8c097b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
       - main
 
 jobs:
-  lint:
+  check-lint:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -18,7 +18,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: '21'
+          node-version: '16'
 
       - name: Install dependencies
         run: npm install
@@ -26,9 +26,9 @@ jobs:
       - name: Run lint
         run: npm run lint
 
-  test:
+  run-tests:
     runs-on: ubuntu-latest
-    needs: lint
+    needs: check-lint
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
diff --git a/src/caches/ttl.ts b/src/caches/ttl.ts
index cfb638c..df2bff9 100644
--- a/src/caches/ttl.ts
+++ b/src/caches/ttl.ts
@@ -1,6 +1,5 @@
 import { Cache } from './cache'
 import { TTLParams, Keyable } from '../types'
-import { SizeError } from '../utils'
 
 /**
  * ### About