diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 84f864b..0334e53 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,15 +39,13 @@ jobs:
         if: ${{ matrix.php-version != env.COVERAGE_PHP_VERSION }}
 
       - name: Run PHPUnit with coverage
-        run: |
-          mkdir -p 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 }}
 
   coding-standard:
diff --git a/README.md b/README.md
index d87980e..b4ce9f8 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Brick\Std
 An attempt at a standard library for PHP.
 
 [![Build Status](https://github.com/brick/std/workflows/CI/badge.svg)](https://github.com/brick/std/actions)
-[![Coverage Status](https://coveralls.io/repos/github/brick/std/badge.svg?branch=master)](https://coveralls.io/github/brick/std?branch=master)
+[![Coverage Status](https://codecov.io/github/brick/std/graph/badge.svg)](https://codecov.io/github/brick/std)
 [![Latest Stable Version](https://poser.pugx.org/brick/std/v/stable)](https://packagist.org/packages/brick/std)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](http://opensource.org/licenses/MIT)
 
diff --git a/composer.json b/composer.json
index 04c8d92..ad7d136 100644
--- a/composer.json
+++ b/composer.json
@@ -13,8 +13,7 @@
   "require-dev": {
     "ext-curl": "*",
     "ext-json": "*",
-    "phpunit/phpunit": "^11.5",
-    "php-coveralls/php-coveralls": "^2.2"
+    "phpunit/phpunit": "^11.5"
   },
   "suggest": {
     "ext-json": "Required to use JsonEncoder and JsonDecoder"