diff --git a/python_experiments/requirements.txt b/python_experiments/requirements.txt
index 502a271..aca0566 100644
--- a/python_experiments/requirements.txt
+++ b/python_experiments/requirements.txt
@@ -36,7 +36,7 @@ pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2018.3
 PyWavelets==0.5.2
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==17.0.0
 requests==2.20.0
 sacred==0.7b2