diff --git a/Dockerfile b/Dockerfile
index c66eb32..029f0d7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -198,17 +198,15 @@ RUN echo @testing http://nl.alpinelinux.org/alpine/edge/testing >> /etc/apk/repo
     #curl iconv session
     #docker-php-ext-install pdo_mysql pdo_sqlite mysqli mcrypt gd exif intl xsl json soap dom zip opcache && \
     docker-php-ext-install iconv pdo_mysql pdo_sqlite mysqli gd exif intl xsl json soap dom zip opcache && \
-    pecl install xdebug-2.6.0 && \
+    pecl install xdebug-2.7.0RC1 && \
     docker-php-source delete && \
     mkdir -p /etc/nginx && \
     mkdir -p /var/www/app && \
     mkdir -p /run/nginx && \
     mkdir -p /var/log/supervisor && \
-    EXPECTED_COMPOSER_SIGNATURE=$(wget -q -O - https://composer.github.io/installer.sig) && \
     php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" && \
-    php -r "if (hash_file('SHA384', 'composer-setup.php') === '${EXPECTED_COMPOSER_SIGNATURE}') { echo 'Composer.phar Installer verified'; } else { echo 'Composer.phar Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;" && \
-    php composer-setup.php --install-dir=/usr/bin --filename=composer && \
-    php -r "unlink('composer-setup.php');"  && \
+    php composer-setup.php --quiet --install-dir=/usr/bin --filename=composer && \
+    rm composer-setup.php && \
     pip install -U pip && \
     pip install -U certbot && \
     mkdir -p /etc/letsencrypt/webrootauth && \