diff --git a/requirements.txt b/requirements.txt
index db768e8..7057bf5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@
 asn1crypto==0.24.0        # via cryptography
 attrs==18.2.0             # via pytest
 certifi==2018.8.24        # via requests
-cffi==1.11.5              # via cryptography
+cffi==1.13.2              # via cryptography
 chardet==3.0.4            # via requests
 click==6.7                # via mootdx, pytdx
 coloredlogs==10.0