diff --git a/requirements.txt b/requirements.txt
index 0f28190..c5c00d5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 Flask==1.0.2
-PyYAML==5.1
+PyYAML==5.4
 GitPython==2.1.12
 docker==2.7.0
 requests==2.22.0