diff --git a/README.md b/README.md
index a3ea5b8..5342358 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Include [swagger-ui](https://github.com/swagger-api/swagger-ui) as Rails engine
 
 Swagger UI version | Rails version
 ------------------ | ----------------
-2.2.10             | >= 4.2, <6
+2.2.10             | >= 4.2, <7
 
 ## Features
 * Supports API documentation versioning / multiple APIs documentation