diff --git a/docker/Dockerfile b/docker/Dockerfile
index ecdfc65..3585e46 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,19 +1,15 @@
 FROM ubuntu:20.04
 
+# required to silently install libxml2-dev
+ENV DEBIAN_FRONTEND=noninteractive
+
 RUN apt-get update \
-        && apt-get install -y --no-install-recommends make tar gzip git curl ca-certificates gcc libgnutls28-dev libjansson-dev libncurses-dev \
-        && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends libxml2-dev \
-        && curl -O https://ftp.gnu.org/pub/gnu/emacs/emacs-27.1.tar.gz \
-        && tar -xzf emacs-27.1.tar.gz \
-        && cd emacs-27.1 \
-        && JSON_CFLAGS='-I/usr/include' JSON_LIBS='-ljansson' \
-           LIBGNUTLS_CFLAGS='-I/usr/include' LIBGNUTLS_LIBS='-lgnutls' \
-           LIBXML2_CFLAGS='-I/usr/include/libxml2' LIBXML2_LIBS='-lxml2' \
-        ./configure --without-makeinfo --with-modules \
-        && make install \
-        && apt-get remove -y gcc perl \
-        && apt-get autoremove -y \
-        && rm -rf /emacs-27.1.tar.gz /emacs-27.1 /var/lib/apt/lists/* /root/.cache/*
+        && apt-get -y --no-install-recommends install software-properties-common \
+        && apt-add-repository -y ppa:kelleyk/emacs \
+        && apt-get -y --no-install-recommends install emacs27-nox \
+        && apt-get -y purge software-properties-common \
+        && apt-get -y autoremove \
+        && rm -rf /var/lib/apt/lists/* /root/.cache/*
 
 ENV WORKSPACE "/workspace"
 ENV ELISP_PATH "${WORKSPACE}/pkg"