diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c7ad5a0..6391ec0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,15 +47,13 @@ jobs:
         if: ${{ matrix.php-version != env.COVERAGE_PHP_VERSION }}
 
       - name: Run PHPUnit with coverage
-        run: |
-          mkdir -p build/logs
-          vendor/bin/phpunit --coverage-clover build/logs/clover.xml
+        run: vendor/bin/phpunit --coverage-clover clover.xml
         if: ${{ matrix.php-version == env.COVERAGE_PHP_VERSION }}
 
-      - name: Upload coverage report to Coveralls
-        run: vendor/bin/php-coveralls --coverage_clover=build/logs/clover.xml -v
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
         env:
-          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         if: ${{ matrix.php-version == env.COVERAGE_PHP_VERSION }}
 
   psalm:
diff --git a/README.md b/README.md
index cd2fe89..fcb674e 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 A PHP library to validate and format postcodes.
 
 [![Build Status](https://github.com/brick/postcode/workflows/CI/badge.svg)](https://github.com/brick/postcode/actions)
-[![Coverage Status](https://coveralls.io/repos/github/brick/postcode/badge.svg?branch=master)](https://coveralls.io/github/brick/postcode?branch=master)
+[![Coverage Status](https://codecov.io/github/brick/postcode/graph/badge.svg)](https://codecov.io/github/brick/postcode)
 [![Latest Stable Version](https://poser.pugx.org/brick/postcode/v/stable)](https://packagist.org/packages/brick/postcode)
 [![Total Downloads](https://poser.pugx.org/brick/postcode/downloads)](https://packagist.org/packages/brick/postcode)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](http://opensource.org/licenses/MIT)
diff --git a/composer.json b/composer.json
index 83714df..86560bf 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,6 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^11.0",
-    "php-coveralls/php-coveralls": "^2.0",
     "vimeo/psalm": "6.15.1"
   },
   "autoload": {