diff --git a/Dockerfile b/Dockerfile
index 60626ad..581eaf9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,12 +29,12 @@ RUN apt-get clean \
 # Get Rust
 RUN mkdir -m755 /opt/rust /opt/cargo
 ENV RUSTUP_HOME=/opt/rust CARGO_HOME=/opt/cargo PATH=/opt/cargo/bin:$PATH
-RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
-
 # set minimal rust version here to use a newer stable version
-ARG CACHEBUST=1.61
+ENV RUST_VERSION=1.67
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain=$RUST_VERSION
+
 # install latest stable rust toolchian, with llvm-tools-preview (for coverage)
-RUN rustup toolchain install stable --component llvm-tools-preview
+RUN rustup toolchain install $RUST_VERSION --component llvm-tools-preview
 # Get cargo make, llvm-cov
 RUN /opt/cargo/bin/cargo install --force cargo-make cargo-llvm-cov