diff --git a/docker/Dockerfile b/docker/Dockerfile
index 70b898b..ecdfc65 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,14 +1,19 @@
 FROM ubuntu:20.04
 
 RUN apt-get update \
-        && apt-get install -y --no-install-recommends make tar gzip git curl ca-certificates gcc libgnutls28-dev libncurses-dev \
+        && 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 \
-        && LIBGNUTLS_CFLAGS='-I/usr/include' LIBGNUTLS_LIBS='-L/usr/lib/x86_64-linux-gnu -lgnutls' ./configure --without-makeinfo --with-modules \
+        && 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 autoremove \
-        && rm -rf /emacs-27.1 /var/lib/apt/lists/* /root/.cache/*
+        && 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/*
 
 ENV WORKSPACE "/workspace"
 ENV ELISP_PATH "${WORKSPACE}/pkg"