diff --git a/multi-php-fpm/Dockerfile b/multi-php-fpm/Dockerfile
index cca32bf..86f54c7 100644
--- a/multi-php-fpm/Dockerfile
+++ b/multi-php-fpm/Dockerfile
@@ -5,7 +5,8 @@ RUN apt-get update; apt-get full-upgrade -y; apt-get autoclean -y
 COPY project/buildtime/sury-repo.sh /tmp/buildtime/sury-repo.sh
 RUN /bin/sh /tmp/buildtime/sury-repo.sh 
 
-ENV BUILDTIME_PHP_VER_INST="8.2"
+ARG BUILDTIME_PHP_VER_INST="8.2"
+ENV BUILDTIME_PHP_VER_INST=${BUILDTIME_PHP_VER_INST}
 COPY project/buildtime/buildtime_php_ver_inst.sh /tmp/buildtime/buildtime_php_ver_inst.sh
 RUN /bin/sh /tmp/buildtime/buildtime_php_ver_inst.sh
 ENV DEF_PHP_INTERPRETER="8.2"