diff --git a/Machine_learning/grokking_ml_book/requirements.txt b/Machine_learning/grokking_ml_book/requirements.txt
index db18b5a..c1d7e6a 100644
--- a/Machine_learning/grokking_ml_book/requirements.txt
+++ b/Machine_learning/grokking_ml_book/requirements.txt
@@ -41,7 +41,7 @@ conda-package-handling==1.6.0
 conda-verify==3.4.2
 contextlib2==0.6.0.post1
 coremltools==3.3
-cryptography==2.8
+cryptography==39.0.1
 cycler==0.10.0
 Cython==0.29.15
 cytoolz==0.10.1