diff --git a/Dockerfile b/Dockerfile
index 5466d5e..9617b5f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,6 +5,7 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
     apt-get update --yes --fix-missing && apt-get upgrade --yes && \
     apt-get install --yes --no-install-recommends \
         apt-utils \
+        build-essential \
         bash \
         coreutils \
         python-pip \
diff --git a/files/requirements.txt b/files/requirements.txt
index b72a876..070c190 100644
--- a/files/requirements.txt
+++ b/files/requirements.txt
@@ -11,6 +11,7 @@ markdown-attr-plus
 MarkupSafe
 pelican
 pelican-alias
+pillow
 Pygments
 pytz
 six