diff --git a/Dockerfile b/Dockerfile
index 565fba1..e1dd98c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,7 @@ RUN apt-get update \
     && pecl install xdebug \
     && curl -sS https://getcomposer.org/installer | php \
     && mv composer.phar /usr/local/bin/composer \
+    && composer global require hirak/prestissimo \
     && sed -ri -e 's!/var/www/html!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/sites-available/*.conf \
     && sed -ri -e 's!/var/www/!${APACHE_DOCUMENT_ROOT}!g' /etc/apache2/apache2.conf /etc/apache2/conf-available/*.conf \
     && a2enmod rewrite
diff --git a/README.md b/README.md
index 8e41439..1d812ce 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,6 @@ docker-compose up -d
 4. Composer と yarn を使い必要なライブラリをインストールします。
 
 ```
-docker-compose exec web composer global require hirak/prestissimo
 docker-compose exec web composer install
 docker-compose exec web yarn install
 ```