diff --git a/requirements.txt b/requirements.txt
index 908de2b..c833d6a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ Keras==2.1.6
 Markdown==2.6.11
 numpy==1.14.2
 protobuf==3.5.2.post1
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 scikit-learn==0.19.1
 scipy==1.0.1