diff --git a/requirements.txt b/requirements.txt
index f2293ab..809d1ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ pycparser==2.18
 pycrypto==2.6.1
 PyNaCl==1.2.1
 pyvmomi==6.7.0
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 six==1.11.0
 urllib3==1.22