diff --git a/requirements.txt b/requirements.txt
index 47bf84f..94ed87d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ joblib==0.13.2
 MarkupSafe==1.1.1
 marshmallow==2.19.5
 numpy==1.16.4
-PyYAML==5.1.1
+PyYAML==5.4
 schema==0.7.0
 scikit-learn==0.21.0
 scipy==1.3.0