diff --git a/requirements.txt b/requirements.txt
index 0b831a1..3934fbb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,7 +50,7 @@ pysocks==1.6.8
 #python==3.6.6 - remove this because 3.6 is installed by default
 python-dateutil==2.7.3
 pytz==2018.5
-pyyaml==3.13
+pyyaml==5.4
 #readline==7.0  - removing this so binder works
 requests==2.19.1
 s3transfer==0.1.13