diff --git a/Dockerfile b/Dockerfile
index 674c16c..3a2f9b7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,7 @@ RUN apt-get update -qq && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /var/log/*
 
 # PHP Extensions
-RUN docker-php-ext-install -j$(nproc) opcache mbstring
+RUN docker-php-ext-install -j$(nproc) opcache gd bcmath
 COPY --link conf/php.ini /usr/local/etc/php/conf.d/app.ini
 
 # Apache