diff --git a/setup.py b/setup.py
index 5365842..216a5fc 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
     "future",
     "geomet",
     "python-dateutil==2.*",
-    "PyYAML==5.*",
+    "PyYAML==6.*",
     "six==1.*",
     "tabulate==0.8.*",
     "typing-extensions==3.*"]