diff --git a/requirements.txt b/requirements.txt
index bbdb0d6..235060f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@ google-auth==1.24.0
 google-api-python-client==1.12.8
 icalendar==4.0.7
 pytz==2020.5
-PyYAML==5.3.1
+PyYAML==5.4.1