diff --git a/requirements.txt b/requirements.txt
index e35a401..0abf4a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,4 +11,4 @@ pycparser==2.10
 requests==2.4.3
 six==1.8.0
 urllib3==1.9.1
-PyYAML==3.11
+PyYAML==5.4