diff --git a/README.md b/README.md
index d83375c..854e4dc 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,11 @@ Installation
 ------------
 Add it to your Gemfile
 
+    #rails 6
     gem 'impressionist'
+    
+    #rails 5 or lower
+    gem 'impressionist', '~>1.6.1'
 
 Install with Bundler