diff --git a/environment/requirements.txt b/environment/requirements.txt
index 6b16793..cc8c064 100644
--- a/environment/requirements.txt
+++ b/environment/requirements.txt
@@ -71,7 +71,7 @@ pytest==4.0.1
 python-dateutil==2.7.5
 pytz==2018.7
 PyWavelets==1.0.1
-PyYAML==4.2b4
+PyYAML==5.4
 psutil==5.4.8
 ray[rllib,debug]==0.6.4
 redis==3.0.1