diff --git a/requirements.txt b/requirements.txt
index eeb1e04..1f15f29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ more-itertools==7.0.0
 pluggy==0.6.0
 py==1.8.0
 pytest==3.5.0
-PyYAML==5.1
+PyYAML==5.4
 requests==2.22.0
 simplejson==3.13.2
 six==1.12.0