diff --git a/TrackingNtuples/scripts/mlenv-requirements.txt b/TrackingNtuples/scripts/mlenv-requirements.txt
index fc79e9c..2fc46c2 100644
--- a/TrackingNtuples/scripts/mlenv-requirements.txt
+++ b/TrackingNtuples/scripts/mlenv-requirements.txt
@@ -64,7 +64,7 @@ pyparsing==2.3.1
 pyrsistent==0.14.11
 python-dateutil==2.8.0
 pytz==2018.9
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==18.0.1
 qtconsole==4.4.3
 requests==2.21.0
diff --git a/TrackingNtuples/scripts/venv-requirements.txt b/TrackingNtuples/scripts/venv-requirements.txt
index 2cb1324..5d16598 100644
--- a/TrackingNtuples/scripts/venv-requirements.txt
+++ b/TrackingNtuples/scripts/venv-requirements.txt
@@ -62,7 +62,7 @@ Pygments==2.3.0
 pyparsing==2.3.0
 python-dateutil==2.7.5
 pytz==2018.7
-PyYAML==3.13
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.4.3
 scandir==1.9.0