diff --git a/requirements.txt b/requirements.txt
index feccb4d..5861b82 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ chardet==3.0.4
 idna==2.8
 nested-lookup==0.2.17
 numpy==1.16.4
-PyYAML==5.1.1
+PyYAML==5.4
 requests==2.22.0
 six==1.12.0
 urllib3==1.25.3