diff --git a/requirements.txt b/requirements.txt
index fc211c7..40b39ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 prettytable
 setuptools
-pyyaml
+pyyaml==5.3
 ipaddress
 six
 colorama==0.4.3