diff --git a/Dockerfile b/Dockerfile
index c4f2420..23f1769 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,16 @@
 FROM registry.sindominio.net/debian
 
-ARG PHP_VERSION=7.4
+ARG PHP_VERSION=none
 
 RUN apt-get update
 RUN apt-get -qy install php-fpm
 
+RUN export PHP_VERSION=`dpkg -s php-fpm | grep Version | cut -f2 -d" " | cut -d":" -f2 | cut -d"+" -f1`
+
 COPY php-fpm.conf /etc/php/$PHP_VERSION/fpm/php-fpm.conf
 
+RUN echo $PHP_VERSION
+
 RUN echo "include=/etc/php/$PHP_VERSION/fpm/pool.d/*.conf" >> /etc/php/$PHP_VERSION/fpm/php-fpm.conf
 
 COPY www.conf /etc/php/$PHP_VERSION/fpm/pool.d/www.conf