diff --git a/Dockerfile b/Dockerfile
index cdcdc2c..82c8cc3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,4 +2,5 @@ FROM php:7.4-cli-alpine
 
 RUN apk add --no-cache --virtual .persistent-deps libffi-dev \
     && docker-php-ext-configure ffi --with-ffi \
-    && docker-php-ext-install ffi
+    && docker-php-ext-install ffi \
+    && apk add --no-cache php7-phpdbg
diff --git a/Jenkinsfile b/Jenkinsfile
index 11ecb58..dbe3a3b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -3,7 +3,6 @@ pipeline {
  	stages {
  		stage('PHP 7.4') {
  			steps {
- 				sh 'apk add --no-cache php7-phpdbg'
  				sh 'curl -sS https://getcomposer.org/installer | php'
  				sh 'php composer.phar install'
  				sh 'phpdbg -qrr -- ./vendor/bin/phpunit --coverage-text --colors=never -c phpunit.xml tests'