diff --git a/.coveralls.yml b/.coveralls.yml
deleted file mode 100644
index 6b74c21..0000000
--- a/.coveralls.yml
+++ /dev/null
@@ -1 +0,0 @@
-src_dir: lib
diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 556e105..094f89e 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -23,7 +23,6 @@ jobs:
       - uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
-          coverage: none
           extensions: gmp, bcmath
           tools: composer
       - uses: actions/checkout@v2
@@ -32,4 +31,10 @@ jobs:
           echo "::add-matcher::${{ runner.tool_cache }}/php.json"
           echo "::add-matcher::${{ runner.tool_cache }}/phpunit.json"
       - run: composer install
-      - run: vendor/bin/phpunit
+      - run: vendor/bin/phpunit --coverage-clover build/logs/clover.xml
+      - name: Upload coverage results to Coveralls
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          composer global require php-coveralls/php-coveralls
+          php-coveralls --coverage_clover=build/logs/clover.xml -v
diff --git a/composer.json b/composer.json
index a44bf76..842c77f 100644
--- a/composer.json
+++ b/composer.json
@@ -22,8 +22,7 @@
         "php": "~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0",
-        "php-coveralls/php-coveralls": "~2.0"
+        "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0"
     },
     "suggest": {
         "ext-gmp": "GMP is the preferred extension for big integer calculations",