diff --git a/setup.cfg b/setup.cfg
index 5fe0ef74e..387adc9a4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -81,7 +81,7 @@ install_requires =
     paramiko >= 2.4.2, < 3
     pexpect >= 4.6.0, < 5
     psutil == 5.4.6; sys_platform!="win32" and sys_platform!="cygwin"
-    PyYAML == 3.13
+    PyYAML >= 5.1, < 6
     sh == 1.12.14
     six == 1.11.0
     tabulate == 0.8.2