diff --git a/kernel-builder/Dockerfile b/kernel-builder/Dockerfile
index 16ee8dc..66e229a 100644
--- a/kernel-builder/Dockerfile
+++ b/kernel-builder/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:sid
+FROM debian:buster
 LABEL maintainer "Jessie Frazelle <jess@linux.com>"
 
 RUN dpkg --add-architecture arm64 \
diff --git a/pandoc/Dockerfile b/pandoc/Dockerfile
index b13978c..5336a39 100644
--- a/pandoc/Dockerfile
+++ b/pandoc/Dockerfile
@@ -1,6 +1,14 @@
 FROM haskell
 LABEL maintainer "Jessie Frazelle <jess@linux.com>"
 
-RUN cabal update && cabal install pandoc pandoc-citeproc
+RUN buildDeps=' \
+		unzip \
+	' \
+	&& set -x \
+	&& apt-get update && apt-get install -y $buildDeps --no-install-recommends \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& cabal update \
+	&& cabal install pandoc pandoc-citeproc  \
+	&& apt-get purge -y --auto-remove $buildDeps
 
 ENTRYPOINT [ "pandoc" ]
diff --git a/vagrant/Dockerfile b/vagrant/Dockerfile
index eec1370..96d8ff3 100644
--- a/vagrant/Dockerfile
+++ b/vagrant/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:sid
+FROM debian:buster
 LABEL maintainer "Jessie Frazelle <jess@linux.com>"
 
 RUN	apt-get update && apt-get install -y \