diff --git a/requirements.txt b/requirements.txt
index a22ddab..4d84842 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,3 +16,4 @@ black==20.8b1
 pre-commit~=2.9
 mypy==0.790
 pdoc3==0.7.*
+decorator~=4.4
\ No newline at end of file