diff --git a/Dockerfile b/Dockerfile
index c14aba0..22fbd51 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,7 +56,7 @@ RUN sed -i 's/listen = 127.0.0.1:9000/listen = \/run\/php\/php-fpm.sock/' /usr/l
     && sed -i 's/;listen.owner = www-data/listen.owner = www-data/' /usr/local/etc/php-fpm.d/www.conf \
     && sed -i 's/;listen.group = www-data/listen.group = www-data/' /usr/local/etc/php-fpm.d/www.conf \
     && sed -i 's/;listen.mode = 0660/listen.mode = 0660/' /usr/local/etc/php-fpm.d/www.conf \
-    && echo 'clear_env = no' >> /usr/local/etc/php-fpm.d/www.conf \
+    && sed -i 's/;clear_env = no/clear_env = no/' /usr/local/etc/php-fpm.d/www.conf \
     && cp /usr/local/etc/php/php.ini-production /usr/local/etc/php/php.ini \
     && sed -i 's/upload_max_filesize = 2M/upload_max_filesize = 200M/' /usr/local/etc/php/php.ini \
     && sed -i 's/post_max_size = 8M/post_max_size = 200M/' /usr/local/etc/php/php.ini \