diff --git a/README.md b/README.md
index 71b9f4e..784d253 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Copyright (c) 2018 SunSpec Alliance
 
 
 # Requirements
-- Python 2.7, 3.5-3.6
+- Python 2.7, 3.5-3.8
 - pySerial