diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 40b6da3..f32380e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,10 @@ on:
   push:
   pull_request:
 
+env:
+  PSALM_PHP_VERSION: "8.3"
+  COVERAGE_PHP_VERSION: "8.3"
+
 jobs:
   psalm:
     name: Psalm
@@ -16,7 +20,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "8.1"
+          php-version: ${{ env.PSALM_PHP_VERSION }}
 
       - name: Install composer dependencies
         uses: ramsey/composer-install@v2
@@ -57,16 +61,16 @@ jobs:
 
       - name: Run PHPUnit
         run: vendor/bin/phpunit
-        if: ${{ matrix.php-version != '8.1' }}
+        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
-        if: ${{ matrix.php-version == '8.1' }}
+        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
         env:
           COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        if: ${{ matrix.php-version == '8.1' }}
+        if: ${{ matrix.php-version == env.COVERAGE_PHP_VERSION }}