diff --git a/ci-image/Dockerfile b/ci-image/Dockerfile
index 9f47949..05884d9 100644
--- a/ci-image/Dockerfile
+++ b/ci-image/Dockerfile
@@ -17,7 +17,7 @@ RUN apt-get install -y fontconfig
 RUN apt-get install -y gcc-multilib g++-multilib
 RUN apt-get install -y libxkbcommon-dev libegl-dev
 RUN apt-get install -y zstd curl
-RUN bash -c "curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --profile minimal -y"
+RUN bash -c "curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --profile minimal --default-toolchain stable -y"
 ENV PATH=/root/.cargo/bin:$PATH
 RUN pip3 install "virtualenv<20" pygithub