diff --git a/Dockerfile b/Dockerfile
index 9df6ab7..43bfe71 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -66,9 +66,9 @@ ENV EXT_PARALLEL=2
 ENV NVCC_APPEND_FLAGS="--threads 2"
 ENV MAX_JOBS=4
 # Target RunPod GPU architectures:
-# 8.0 = A100, 8.6 = A10/RTX 3090, 8.9 = RTX 4090/L40, 9.0 = H100/H200
-# Note: Blackwell (10.0) not yet supported by SageAttention
-ENV TORCH_CUDA_ARCH_LIST="8.0;8.6;8.9;9.0"
+# 8.0 = A100, 9.0 = H100/H200
+# Note: 8.6/8.9 excluded due to SageAttention sm90 kernel cross-compile issues
+ENV TORCH_CUDA_ARCH_LIST="8.0;9.0"
 RUN git clone https://github.com/thu-ml/SageAttention.git && \
     cd SageAttention && \
     git checkout 2aecfa8 && \