diff --git a/requirements.txt b/requirements.txt
index 192cee2..cf27b2f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 chevron >= 0.13.1
 protobuf>=3.12.2
-pyyaml == 5.2
+pyyaml==5.4.1
 ply == 3.8