diff --git a/Dockerfile b/Dockerfile
index e96eab26..4773610f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,32 +1,34 @@
 FROM ubuntu:18.04
 ENV DEBIAN_FRONTEND noninteractive
 
-# Install required packages.
 RUN apt-get update -qqy
 RUN apt-get install -qqy --no-install-recommends apt-utils
+
+WORKDIR /root
 RUN apt-get install -qqy build-essential libsqlite3-dev sqlite3 bzip2 \
                          libbz2-dev zlib1g-dev libssl-dev openssl libgdbm-dev \
                          libgdbm-compat-dev liblzma-dev libreadline-dev \
-                         libncursesw5-dev libffi-dev uuid-dev \
-                         libcairo2-dev libjpeg-dev libgif-dev ffmpeg \
-                         apt-transport-https texlive-full sox git
-
-# Install Python 3.7.
-WORKDIR /root
+                         libncursesw5-dev libffi-dev uuid-dev
 RUN apt-get install -qqy wget
 RUN wget -q https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz
 RUN tar -xf Python-3.7.0.tgz
 WORKDIR Python-3.7.0
 RUN ./configure > /dev/null && make -s && make -s install
 RUN python3 -m pip install --upgrade pip
+RUN apt-get install -qqy libcairo2-dev libjpeg-dev libgif-dev
 COPY requirements.txt requirements.txt
 RUN python3 -m pip install -r requirements.txt
 WORKDIR /root
 RUN rm -rf Python-3.7.0*
 
-# Setup timezone.
+RUN apt-get install -qqy ffmpeg
+
 ENV TZ=America/Los_Angeles
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+RUN apt-get install -qqy apt-transport-https
+RUN apt-get install -qqy texlive-full
+RUN apt-get install -qqy sox
+RUN apt-get install -qqy git
 
 ENV DEBIAN_FRONTEND teletype
 ENTRYPOINT ["/bin/bash"]