diff --git a/requirements.txt b/requirements.txt
index b7e14e3..e383694 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.4
 PyWavelets==0.5.2
-PyYAML==3.13
+PyYAML==5.1
 pyzmq==17.0.0
 requests==2.21.0
 scikit-image==0.14.0