diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index 3716a63..84b0177 100755
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -6,7 +6,7 @@ FROM composer:2.3 as vendor
 RUN mkdir -p /opt/validator-api
 WORKDIR /opt/validator-api
 COPY composer.json .
-RUN composer install --no-scripts --prefer-dist
+RUN composer install --no-scripts --prefer-dist --ignore-platform-req=ext-pcntl
 
 #----------------------------------------------------------------------
 # Create base layer for dev and production
@@ -49,7 +49,7 @@ COPY .docker/php.ini /usr/local/etc/php/conf.d/app.ini
 RUN apt-get update -qq \
  && apt-get install -y postgresql-client libpq-dev libzip-dev \
  && docker-php-ext-configure pgsql -with-pgsql=/usr/local/pgsql \
- && docker-php-ext-install opcache pdo pdo_pgsql pgsql zip \
+ && docker-php-ext-install opcache pdo pdo_pgsql pgsql zip pcntl \
  && rm -rf /var/lib/apt/lists/*
 
 #----------------------------------------------------------------------
diff --git a/.docker/application.sh b/.docker/application.sh
index bf42942..32cb089 100755
--- a/.docker/application.sh
+++ b/.docker/application.sh
@@ -33,7 +33,7 @@ run(){
 }
 
 backend(){
-    bash loop-validate.sh
+    exec bash loop-validate.sh
 }
 
 test(){
diff --git a/composer.json b/composer.json
index a089b9a..ead708a 100755
--- a/composer.json
+++ b/composer.json
@@ -8,6 +8,7 @@
     "ext-ctype": "*",
     "ext-iconv": "*",
     "ext-zip": "*",
+    "ext-pcntl": "*",
     "composer/package-versions-deprecated": "^1.11",
     "doctrine/annotations": "^1.10",
     "doctrine/doctrine-bundle": "^2.1",
diff --git a/docker-compose.yml b/docker-compose.yml
index c7a9164..c122479 100755
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -60,7 +60,7 @@ services:
   #-----------------------------------------------------------------------
   backend:
     image: ignf/validator-api:master-dev
-    command: ["/bin/bash","loop-validate.sh"]
+    command: [".docker/application.sh","backend"]
     environment:
       - HTTP_PROXY=${HTTP_PROXY}
       - HTTPS_PROXY=${HTTPS_PROXY}