diff --git a/Day61-65/code/hello-tornado/requirements.txt b/Day61-65/code/hello-tornado/requirements.txt
index 619660c..10602db 100644
--- a/Day61-65/code/hello-tornado/requirements.txt
+++ b/Day61-65/code/hello-tornado/requirements.txt
@@ -6,7 +6,7 @@ attrs==19.1.0
 certifi==2019.3.9
 cffi==1.12.2
 chardet==3.0.4
-cryptography==2.6.1
+cryptography==3.2
 idna==2.8
 multidict==4.5.2
 pycparser==2.19