diff --git a/requirements.txt b/requirements.txt
index f91bfa8..13cf443 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,4 @@ numpy >= 1.18.1
 pandas >= 1.0.1
 requests == 2.20.1
 scipy == 1.1.0
-PyYAML==5.1
+PyYAML==5.4