diff --git a/python/examples/detection/detect_image.py b/python/examples/detection/detect_image.py
index d2f42c4..3587729 100644
--- a/python/examples/detection/detect_image.py
+++ b/python/examples/detection/detect_image.py
@@ -94,7 +94,7 @@ def main():
   interpreter = make_interpreter(args.model)
   interpreter.allocate_tensors()
 
-  image = Image.open(args.input)
+  image = Image.open(args.input).convert('RGB')
   scale = detect.set_input(interpreter, image.size,
                            lambda size: image.resize(size, Image.ANTIALIAS))