diff --git a/docker/Dockerfile b/docker/Dockerfile
index 95d845ace..5a1ab7ba0 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -3,9 +3,9 @@ FROM ubuntu:20.04
 RUN apt-get update \
     && DEBIAN_FRONTEND="noninteractive" apt-get -y install tzdata \
     && apt-get install -y \
-            time git-core build-essential gcc-multilib \
+            time git-core build-essential gcc-multilib clang \
             libncurses5-dev zlib1g-dev gawk flex gettext wget unzip python \
-            python3 python3-pip python3-yaml libssl-dev rsync \
+            python3 python3-pip python3-yaml libssl-dev rsync llvm llvm-12 \
     && apt-get clean
 RUN git config --global user.email "you@example.com"
 RUN git config --global user.name "Your Name"