diff --git a/app/Dockerfile b/app/Dockerfile
index 6f3de09..79fea15 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -1,7 +1,9 @@
 ## GPU-ready base image with CUDA 12 + cuDNN 9 runtime
 # If you don't have an NVIDIA GPU or the NVIDIA Container Toolkit, this image still runs on CPU.
 # For smaller CPU-only images, you can switch back to python:3.11-slim.
-FROM nvidia/cuda:12.4.1-cudnn9-runtime-ubuntu22.04
+# Use a widely available CUDA + cuDNN runtime tag. If you prefer newer CUDA,
+# adjust this to a tag that exists on Docker Hub.
+FROM nvidia/cuda:12.3.2-cudnn8-runtime-ubuntu22.04
 
 # Keep python fast/quiet and pip lean
 ENV PYTHONDONTWRITEBYTECODE=1 \