diff --git a/requirements.txt b/requirements.txt
index 234c777..7ca62fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ itsdangerous==0.24
 Jinja2==2.9.6
 MarkupSafe==1.0
 pkg-resources==0.0.0
-PyYAML==3.12
+PyYAML==5.1
 requests==2.18.4
 urllib3==1.22
 Werkzeug==0.15.3