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..51d035e 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
@@ -11,7 +11,7 @@ certifi==2019.11.28
 cffi==1.14.0
 chardet==3.0.4
 click==7.1.1
-cryptography==2.8
+cryptography==3.2
 cycler==0.10.0
 cymem==2.0.2
 dataclasses==0.6