diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 08d5e9d27d5f2c205157dd8f17917b842de0288f..fbb47603f6e8b90f688e95c5e120e786f97bbf85 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -14,6 +14,7 @@ stages:
     PHP_VERSION: "7.1"
   before_script:
     - apt-get update -yqq && apt-get install -yqq unzip git-core
+    - docker-php-ext-enable zip json
     - php -v
     - curl -sSfL https://raw.githubusercontent.com/composer/getcomposer.org/${COMPOSER_INSTALLER_COMMITID}/web/installer | php -- --install-dir=/usr/local/bin --filename=composer --quiet
     - composer -V