diff --git a/Dockerfile b/Dockerfile
index 35f0496..eca89d4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,12 +2,13 @@ FROM quay.io/almalinux/almalinux:9 AS compile-image
 
 ENV SHADOWSOCKS_VER=1.20.1
 ENV V2RAY_PLUGIN_VER=1.3.2
+ENV RUST_VER=1.79.0
 
 WORKDIR /root
 
 RUN set -ex && dnf upgrade -y && dnf install -y binutils wget make gcc xz
 
-RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --default-toolchain=${RUST_VER} -y
 
 RUN wget https://github.com/shadowsocks/shadowsocks-rust/archive/refs/tags/v${SHADOWSOCKS_VER}.tar.gz
 RUN tar -xf v${SHADOWSOCKS_VER}.tar.gz