diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1ff5e5d..63f71d5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,6 +27,7 @@ jobs:
           php-version: ${{ matrix.php-versions }}
           tools: composer:v1
           coverage: xdebug
+          extensions: bcmath, gd
 
       - name: Install Composer dependencies
         run: composer install