diff --git a/requirements-dev.txt b/requirements-dev.txt
index 23ce116..84896de 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,4 +4,5 @@ pytest
 pytest-cov
 pytest-flake8
 pytest-xdist
-flake8
\ No newline at end of file
+flake8
+chardet<5.0.0