diff --git a/requirements.txt b/requirements.txt
index 8ff6281..8dfa216 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ APScheduler==3.8.1
 arrow==0.15.2
 blinker==1.4
 certifi==2019.9.11
-cffi==1.12.3
+cffi
 chardet==3.0.4
 Click==7.0
 h11==0.9.0