diff --git a/Dockerfile b/Dockerfile
index f03883c..8739222 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,10 +1,10 @@
 FROM php:7.4.16-cli-alpine
 
 RUN apk update \
-&& apk add --no-cache --virtual .build-dependencies zip zlib-dev libzip-dev \
+&& apk add --no-cache --virtual .build-dependencies zip zlib-dev libzip-dev libpng-dev \
 && php -r "readfile('https://getcomposer.org/installer');" | php -- --install-dir=/usr/local/bin --filename=composer \
 && apk del .build-dependencies \
-&& docker-php-ext-install sockets bcmath \
+&& docker-php-ext-install sockets bcmath gd \
 && apk add --no-cache git
 
 COPY ./custom.ini /usr/local/etc/php/conf.d/