diff --git a/docker/Dockerfile-pandoc b/docker/Dockerfile-pandoc
index 9921665..fc7bfab 100644
--- a/docker/Dockerfile-pandoc
+++ b/docker/Dockerfile-pandoc
@@ -5,6 +5,7 @@ RUN apt-get update \
 		pandoc \
 		jq \
 		awscli \
+                libpng-dev \
 	&& apt-get clean
 
 COPY --chown=www-data:www-data pandoc/* /var/www/html/
@@ -16,5 +17,7 @@ RUN mkdir \
 		/var/www/datatmp \
 		/var/www/html/imgs
 
+RUN docker-php-ext-install gd
+
 # enable php production defaults
-RUN cp $PHP_INI_DIR/php.ini-production $PHP_INI_DIR/php.ini
\ No newline at end of file
+RUN cp $PHP_INI_DIR/php.ini-production $PHP_INI_DIR/php.ini