diff --git a/openreservation/requirements.txt b/openreservation/requirements.txt
index 0610a26..dc449ca 100644
--- a/openreservation/requirements.txt
+++ b/openreservation/requirements.txt
@@ -42,7 +42,7 @@ pytest-forked==1.2.0
 pytest-xdist==1.33.0
 python3-openid==3.2.0
 pytz==2020.1
-pyyaml==5.3.1
+pyyaml==5.4
 regex==2020.7.14; python_version > "2.7"
 requests==2.24.0
 requests-oauthlib==1.3.0