diff --git a/requirements.txt b/requirements.txt
index 7e49273..8ed7209 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ arrow==1.1.0
 bidict==0.21.2
 certifi==2021.5.30
 cffi==1.14.5
-chardet==4.0.0
+chardet==3.0.4
 greenlet==1.1.0
 idna==2.10
 pycparser==2.20