diff --git a/requirements.txt b/requirements.txt
index 132c693..ded8477 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ chardet==3.0.4
 idna==2.5
 packaging==16.8
 pyparsing==2.2.0
-PyYAML==3.12
+PyYAML==5.1
 requests==2.18.1
 six==1.10.0
 urllib3==1.21.1