diff --git a/doc/src/CNN/cnn.do.txt b/doc/src/CNN/cnn.do.txt
index aaede0508..2cd2aed0e 100644
--- a/doc/src/CNN/cnn.do.txt
+++ b/doc/src/CNN/cnn.do.txt
@@ -8,7 +8,7 @@ DATE: today
 * add material about the mathematics, with more explanations
 * update codes to tensorflow 2
 * add more elaborated examples
-
+* update keras codes and think of pytorch examples?
 !split
 ===== Convolutional Neural Networks (recognizing images) =====