diff --git a/.woodpecker.yml b/.woodpecker.yml
index aaf8885..801dfc6 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -7,7 +7,7 @@ matrix:
 
 steps:
   dependencies:
-    image: gitnet.fr/deblan/php:${PHP_VERSION}
+    image: gitnet.fr/deblan/php:$PHP_VERSION
     commands:
       - php /usr/local/bin/composer install
       - php /usr/local/bin/composer require --dev phpunit/phpunit