diff --git a/Dockerfile b/Dockerfile
index 787f57a..23c364e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,5 +3,3 @@ FROM php:8-cli-alpine
 RUN apk add --no-cache --virtual .persistent-deps libffi-dev \
     && docker-php-ext-configure ffi --with-ffi \
     && docker-php-ext-install ffi
-
-RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing php8-phpdbg
diff --git a/Jenkinsfile b/Jenkinsfile
index 9ece578..4914f22 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -7,6 +7,7 @@ pipeline {
  	stages {
  		stage('PHP 7.4') {
  			steps {
+ 				sh 'apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing php8-phpdbg'
  				sh 'curl -sS https://getcomposer.org/installer | php'
  				sh 'php composer.phar install'
  				sh 'phpdbg -dffi.enable=1 -qrr -- ./vendor/bin/phpunit --coverage-text --coverage-clover clover.xml --colors=never -c phpunit.xml tests'