diff --git a/requirements.txt b/requirements.txt
index e8e1a14..8a60336 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -71,7 +71,7 @@ python-editor==1.0.3
 python-magic==0.4.15
 pytz==2018.4
 PyWavelets==0.5.2
-PyYAML==3.13
+PyYAML==5.4
 requests==2.18.4
 Rhino==0.0.5
 scikit-learn==0.19.1