diff --git a/docker/app/Dockerfile b/docker/app/Dockerfile
index b3c69f6..2a830d8 100644
--- a/docker/app/Dockerfile
+++ b/docker/app/Dockerfile
@@ -9,12 +9,15 @@
 
 RUN apt-get update && \
 	apt-get install -y --no-install-recommends \
+	bz2 \
+	libgmp3-dev \
 	smbclient libsmbclient-dev \
 	libbz2-dev \
-	libmagickcore-6.q16-3-extra
+	libmagickcore-6.q16-6-extra
 RUN apt-get clean && rm -rf /var/lib/apt/lists/*
 RUN	pecl install \
 	smbclient
+RUN docker-php-ext-install gmp
 RUN docker-php-ext-install bz2
 RUN docker-php-ext-enable smbclient