diff --git a/requirements.txt b/requirements.txt
index 1a25ef4..aff508c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ pylint==2.3.0
 pymongo==3.7.2
 python-dotenv==0.10.2
 pytz==2018.9
-PyYAML==5.1
+PyYAML==5.4
 requests==2.21.0
 six==1.12.0
 sphinxcontrib-qthelp==1.0.2