diff --git a/requirements.txt b/requirements.txt
index 7789406..44504cb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -71,5 +71,5 @@ Werkzeug==1.0.0
 XlsxWriter==1.2.5
 xlwt==1.3.0
 yarl==1.5.1
-PyYAML==5.3.1
+PyYAML>5.3,<7
 tqdm==4.51.0