diff --git a/README.md b/README.md
index 6ebdb65..0acb4eb 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Dockerfile for dpl-heroku image
 
 ## Introduction
 
-Based on ruby:2.6-alpine, this image has the exact things needed for dpl to do heroku deployments using the Heroku API
+Based on ruby:2.7.5-alpine, this image has the exact things needed for dpl to do heroku deployments using the Heroku API
 
 ## Docker Hub