diff --git a/requirements/dev.txt b/requirements/dev.txt
index fcad5cb..aea5d78 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -40,4 +40,4 @@ zipp==0.6.0
 
 # wechat
 wechatpy==1.8.3
-cryptography==2.8
\ No newline at end of file
+cryptography==3.2
\ No newline at end of file
diff --git a/requirements/prod.txt b/requirements/prod.txt
index bef3efa..c75c887 100644
--- a/requirements/prod.txt
+++ b/requirements/prod.txt
@@ -40,7 +40,7 @@ zipp==0.6.0
 
 # wechat
 wechatpy==1.8.3
-cryptography==2.8
+cryptography==3.2
 
 # uwsgi
 uwsgi==2.0.18
\ No newline at end of file