diff --git a/requirements.txt b/requirements.txt
index 4b2294b..a8d7e1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ psutil==5.4.8
 pyparsing==2.3.0
 python-dateutil==2.7.5
 pytz==2018.7
-PyYAML==3.13
+PyYAML==5.4
 requests==2.20.1
 s3transfer==0.2.0
 scikit-learn==0.20.2
diff --git a/requirements3.txt b/requirements3.txt
index c250770..983e4bd 100644
--- a/requirements3.txt
+++ b/requirements3.txt
@@ -113,7 +113,7 @@ python-debian==0.1.32
 python-jose==2.0.2
 pytorch-pretrained-bert==0.3.0
 pytz==2017.3
-PyYAML==3.13
+PyYAML==5.4
 regex==2018.1.10
 requests==2.21.0
 requests-unixsocket==0.1.5