diff --git a/provision-contest/ansible/roles/base_packages/defaults/main.yml b/provision-contest/ansible/roles/base_packages/defaults/main.yml
index 90f1ef2b..6a552323 100644
--- a/provision-contest/ansible/roles/base_packages/defaults/main.yml
+++ b/provision-contest/ansible/roles/base_packages/defaults/main.yml
@@ -42,6 +42,7 @@ INSTALLED_PACKAGES:
   - php-mysql
   - php-xml
   - php-zip
+  - php-bcmath
   - pv
   - python3-sphinx
   - python3-sphinx-rtd-theme