diff --git a/9_Machine_learning/3_OpenCV/dataset/observations-master/mask_classifier/requirements.txt b/9_Machine_learning/3_OpenCV/dataset/observations-master/mask_classifier/requirements.txt
index 99a8259..6e354d7 100644
--- a/9_Machine_learning/3_OpenCV/dataset/observations-master/mask_classifier/requirements.txt
+++ b/9_Machine_learning/3_OpenCV/dataset/observations-master/mask_classifier/requirements.txt
@@ -93,7 +93,7 @@ soupsieve==1.9.5
 spacy==2.1.8
 srsly==0.1.0
 tensorboard==1.14.0
-tensorflow==1.14.0
+tensorflow==2.4.0
 tensorflow-estimator==1.14.0
 termcolor==1.1.0
 terminado==0.8.3