diff --git a/requirements.txt b/requirements.txt
index 2383467..42dea3e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ MarkupSafe==0.23
 py==1.4.31
 pytest==2.9.1
 pytest-httpbin==0.2.3
-PyYAML==3.11
+PyYAML==5.4
 requests==2.9.1
 rfc3987==1.3.5
 six==1.10.0