diff --git a/Sources/php_script/Dockerfile b/Sources/php_script/Dockerfile
index 990451f..4963d6f 100644
--- a/Sources/php_script/Dockerfile
+++ b/Sources/php_script/Dockerfile
@@ -2,4 +2,4 @@ FROM php:8.1-apache
 RUN apt-get update &&  apt-get upgrade -y
 RUN docker-php-ext-install mysqli
 COPY ./script /var/www/html
-RUN ARG CONNECTtoDATABASE = mysqli_connect($HOST, $USERNAME, $PASSWORD, $DATABASE);
+RUN export CON = $(mysqli_connect($HOST, $USERNAME, $PASSWORD, $DATABASE));