diff --git a/Dockerfile b/Dockerfile
index ab88865..5bfede4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,13 +5,16 @@ RUN docker-php-ext-install bcmath \
     && docker-php-ext-install pcntl \
     && apt-get update \
     && apt-get install -y \
-        libicu-dev libxml2-dev libfreetype6-dev libjpeg62-turbo-dev  \
-        libpng-dev libonig-dev libmagickwand-dev python-dev unzip \
+    libicu-dev libxml2-dev libfreetype6-dev libjpeg62-turbo-dev  \
+    libpng-dev libonig-dev libmagickwand-dev python-dev unzip \
     && docker-php-ext-configure gd --with-freetype --with-jpeg \
     && docker-php-ext-install -j$(nproc) intl mbstring pdo xml gd exif bcmath \
     && yes '' | pecl install imagick \
     && docker-php-ext-enable imagick \
-    && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+    && curl -sS https://getcomposer.org/installer \
+    | php -- --install-dir=/usr/local/bin --filename=composer \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
 
 RUN php --version \
     && composer --version