diff --git a/docker/Dockerfile b/docker/Dockerfile
index dbde77284daf2dadcefc9323d9de93b37f2f7e6d..7435d70ce6a878ed3f59cce7e7c3c4ba40857f9f 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -28,7 +28,8 @@ RUN apt-get update \
 
 # Install latest version of most LLVM tools except clang-format because
 # we prioritise stability when it comes to how we format our code.
-ENV LLVM_VERSION=19
+ENV LLVM_VERSION=20
+
 RUN wget -q https://apt.llvm.org/llvm-snapshot.gpg.key -O /etc/apt/trusted.gpg.d/apt.llvm.org.asc \
     && echo "ce6eee4130298f79b0e0f09a89f93c1bc711cd68e7e3182d37c8e96c5227e2f0 /etc/apt/trusted.gpg.d/apt.llvm.org.asc" | sha256sum -c - \
     && . /etc/os-release \