diff --git a/__init__.py b/__init__.py
index a5ea0a9..4eaca51 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,3 +1,35 @@
+import subprocess
+import sys
+import logging
+
+logger = logging.getLogger("BIM-VFI")
+
+
+def _auto_install_deps():
+    """Auto-install missing dependencies on first load."""
+    # gdown
+    try:
+        import gdown  # noqa: F401
+    except ImportError:
+        logger.info("[BIM-VFI] Installing gdown...")
+        subprocess.check_call([sys.executable, "-m", "pip", "install", "gdown"])
+
+    # cupy
+    try:
+        import cupy  # noqa: F401
+    except ImportError:
+        try:
+            import torch
+            major = int(torch.version.cuda.split(".")[0])
+            cupy_pkg = f"cupy-cuda{major}x"
+            logger.info(f"[BIM-VFI] Installing {cupy_pkg} (CUDA {torch.version.cuda})...")
+            subprocess.check_call([sys.executable, "-m", "pip", "install", cupy_pkg])
+        except Exception as e:
+            logger.warning(f"[BIM-VFI] Could not auto-install cupy: {e}")
+
+
+_auto_install_deps()
+
 from .nodes import LoadBIMVFIModel, BIMVFIInterpolate
 
 NODE_CLASS_MAPPINGS = {