diff --git a/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt b/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
index 26d897a..bf4b389 100644
--- a/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
+++ b/Code_Paper_Figures/Supplement/S3_Fit_Algorithm/requirements.txt
@@ -12,7 +12,7 @@ cffi==1.11.5
 chardet==3.0.4
 cloudpickle==0.5.2
 configparser==3.5.0
-cryptography==2.3
+cryptography==3.2
 cycler==0.10.0
 Cython==0.28.2
 decorator==4.3.0