diff --git a/docker/Dockerfile b/docker/Dockerfile
index 8d58449..7f56e9c 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -97,6 +97,8 @@ RUN python${PYTHON_VER} -m venv ${VENV} && \
     mkdir -p /root/.pip && \
     echo "[global]" > /root/.pip/pip.conf && \
     echo "index-url = ${PIP_INDEX}" >> /root/.pip/pip.conf && \
+    echo "[install]" >> /root/.pip/pip.conf && \
+    echo "constraint = ${VENV}/torch-constraint.txt" >> /root/.pip/pip.conf && \
     ${VENV}/bin/pip install -U pip setuptools wheel && \
     # PyTorch ROCm wheels 在海外 CDN，通过代理下载
     export http_proxy=${GIT_PROXY} https_proxy=${GIT_PROXY} && \
@@ -105,6 +107,8 @@ RUN python${PYTHON_VER} -m venv ${VENV} && \
         torchvision \
         pytorch-triton-rocm \
         --index-url ${TORCH_INDEX} && \
+    # 锁定 torch 版本，防止后续 pip install 解析到 CUDA 版
+    echo "torch==2.11.0+rocm7.2" > ${VENV}/torch-constraint.txt && \
     ${VENV}/bin/python -c "import torch; print('PyTorch:', torch.__version__); assert torch.version.hip is not None"
 
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