diff --git a/.github/badges/coverage.svg b/.github/badges/coverage.svg
deleted file mode 100644
index 969d647..0000000
--- a/.github/badges/coverage.svg
+++ /dev/null
@@ -1,20 +0,0 @@
-<svg width="103.3" height="20" viewBox="0 0 1033 200" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="coverage: 100%">
-  <title>coverage: 100%</title>
-  <linearGradient id="a" x2="0" y2="100%">
-    <stop offset="0" stop-opacity=".1" stop-color="#EEE"/>
-    <stop offset="1" stop-opacity=".1"/>
-  </linearGradient>
-  <mask id="m"><rect width="1033" height="200" rx="30" fill="#FFF"/></mask>
-  <g mask="url(#m)">
-    <rect width="603" height="200" fill="#555"/>
-    <rect width="430" height="200" fill="#3C1" x="603"/>
-    <rect width="1033" height="200" fill="url(#a)"/>
-  </g>
-  <g aria-hidden="true" fill="#fff" text-anchor="start" font-family="Verdana,DejaVu Sans,sans-serif" font-size="110">
-    <text x="60" y="148" textLength="503" fill="#000" opacity="0.25">coverage</text>
-    <text x="50" y="138" textLength="503">coverage</text>
-    <text x="658" y="148" textLength="330" fill="#000" opacity="0.25">100%</text>
-    <text x="648" y="138" textLength="330">100%</text>
-  </g>
-  
-</svg>
\ No newline at end of file
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1b2a8db..f230b7b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -41,7 +41,7 @@ jobs:
     if: github.event_name == 'push'
     timeout-minutes: 10
     permissions:
-      contents: write
+      contents: read
 
     steps:
     - name: Checkout code
@@ -59,29 +59,12 @@ jobs:
     - name: Run tests with coverage
       run: npm run test:coverage
 
-    - name: Read coverage summary
-      id: coverage
-      run: |
-        echo "pct=$(jq '.total.lines.pct' coverage/coverage-summary.json)" >> $GITHUB_OUTPUT
-
-    - name: Create badges directory
-      run: mkdir -p .github/badges
-
-    - name: Generate coverage badge
-      uses: emibcn/badge-action@f9150fde070fcca0c4e832437611b44838fcd325 # v2.0.4
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v5
       with:
-        label: 'coverage'
-        status: ${{ steps.coverage.outputs.pct }}%
-        color: ${{ fromJSON(steps.coverage.outputs.pct) >= 80 && 'green' || fromJSON(steps.coverage.outputs.pct) >= 60 && 'yellow' || 'red' }}
-        path: .github/badges/coverage.svg
-
-    - name: Commit coverage badge
-      run: |
-        git config --local user.email "action@github.com"
-        git config --local user.name "GitHub Action"
-        git add .github/badges/coverage.svg
-        git diff --staged --quiet || git commit -m "Update coverage badge"
-        git push
+        token: ${{ secrets.CODECOV_TOKEN }}
+        files: coverage/lcov.info
+        fail_ci_if_error: true
 
     - name: Upload coverage reports
       uses: actions/upload-artifact@v7.0.1
diff --git a/README.md b/README.md
index c0cef0e..1af3378 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 <div align="center">
 
 [![CI](https://github.com/knowledgecode/date-and-time/actions/workflows/test.yml/badge.svg)](https://github.com/knowledgecode/date-and-time/actions/workflows/test.yml)
-[![Coverage](https://raw.githubusercontent.com/knowledgecode/date-and-time/refs/heads/master/.github/badges/coverage.svg)](https://github.com/knowledgecode/date-and-time/actions/workflows/test.yml)
+[![Coverage](https://codecov.io/gh/knowledgecode/date-and-time/graph/badge.svg)](https://codecov.io/gh/knowledgecode/date-and-time)
 [![npm](https://img.shields.io/npm/v/date-and-time)](https://www.npmjs.com/package/date-and-time)
 
 </div>
diff --git a/vitest.config.ts b/vitest.config.ts
index dc7f5e4..8d84fb7 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -12,7 +12,7 @@ export default defineConfig({
       exclude: ['src/**/*.d.ts'],
       include: ['src/**/*.ts'],
       provider: 'v8',
-      reporter: ['json-summary', 'html'],
+      reporter: ['html', 'lcov'],
       thresholds: {
         lines: 100,
         statements: 100,