diff --git a/docker/ci/Dockerfile b/docker/ci/Dockerfile
index 388291c74b..706d7c2aa5 100644
--- a/docker/ci/Dockerfile
+++ b/docker/ci/Dockerfile
@@ -13,4 +13,5 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y \
     g++-arm-linux-gnueabi \
     libgazebo8-dev \
     rustc cargo \
+    python3-lxml \
     && rm -rf /var/lib/apt/lists/*