diff --git a/2017/solutions/rllchatbot/requirements.txt b/2017/solutions/rllchatbot/requirements.txt
index d3da83a50..2cce0e9c7 100644
--- a/2017/solutions/rllchatbot/requirements.txt
+++ b/2017/solutions/rllchatbot/requirements.txt
@@ -17,7 +17,7 @@ certifi==2017.11.5
 cffi==1.10.0
 chardet==3.0.4
 configparser==3.5.0
-cryptography==2.0
+cryptography==3.2
 cvxopt==1.1.4
 cymem==1.31.2
 Cython==0.25.2