diff --git a/build-scripts/drupal7/Dockerfile b/build-scripts/drupal7/Dockerfile
index a7b0d1a19cbbbcc95248361b7d289ddd966c2726..765ce9b77ac7d622ae6bba2c548a63397a486a2e 100644
--- a/build-scripts/drupal7/Dockerfile
+++ b/build-scripts/drupal7/Dockerfile
@@ -32,39 +32,39 @@ RUN curl -sL https://deb.nodesource.com/setup_8.x | bash -
 
 # Install packages.
 RUN apt-get install -y \
-	vim \
-	git \
-	apache2 \
+    vim \
+    git \
+    apache2 \
     php5.6 \
-	php5.6-apc \
-	php5.6-fpm \
+    php5.6-apc \
+    php5.6-fpm \
     php5.6-xml \
     php5.6-simplexml \
     php5.6-mbstring \
-	php5.6-cli \
-	php5.6-mysql \
-	php5.6-gd \
-	php5.6-curl \
-	php5.6-ldap \
-	php5.6-mcrypt \
+    php5.6-cli \
+    php5.6-mysql \
+    php5.6-gd \
+    php5.6-curl \
+    php5.6-ldap \
+    php5.6-mcrypt \
     php5.6-zip \
-	php-pear \
-	libapache2-mod-php5.6 \
+    php-pear \
+    libapache2-mod-php5.6 \
     optipng \
     jpegoptim \
     imagemagick \
     libapache2-mod-fcgid \
     libapache2-mod-fastcgi \
-	curl \
-	mysql-client \
-	openssh-server \
-	phpmyadmin \
-	wget \
+    curl \
+    mysql-client \
+    openssh-server \
+    phpmyadmin \
+    wget \
     ruby-sass \
     ruby-compass \
     nodejs \
     dos2unix \
-	supervisor
+    supervisor
 RUN apt-get clean
 ## enable rewrite and ssl for apache2
 RUN a2enmod rewrite