diff --git a/requirements.txt b/requirements.txt
index f08a6c08..b8dc3fb1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,4 @@ ndg-httpsclient==0.5.0
 pyasn1==0.4.3
 pyOpenSSL==18.0.0
 -e git+https://github.com/LabAdvComp/parcel.git@8cf5fe9922f3f3f1f9930c47783fc18c512d6b6a#egg=parcel
-PyYAML==3.13
+PyYAML==5.1