diff --git a/automation/Dockerfile b/automation/Dockerfile
index 777f408..0b0c4c0 100644
--- a/automation/Dockerfile
+++ b/automation/Dockerfile
@@ -10,5 +10,5 @@ ARG DEBIAN_FRONTEND=noninteractive
 # set CROSS_CONTAINER_IN_CONTAINER to inform `cross` that it is executed from within a container
 ENV CROSS_CONTAINER_IN_CONTAINER=true
 
-RUN cargo install cross
-RUN rustup component add rustfmt clippy
+RUN rustup target add thumbv7m-none-eabi && \
+    rustup component add rustfmt clippy