diff --git a/requirements.txt b/requirements.txt
index f400b19..c6ac415 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ pyparsing==2.4.2
 python-apt==1.6.4
 python-dateutil==2.8.0
 pytz==2019.3
-PyYAML==5.1.2
+PyYAML==5.4
 rdflib==4.2.2
 requests==2.22.0
 ruamel.yaml==0.16.5