diff --git a/Formula/elasticsearch.rb b/Formula/elasticsearch.rb
index da95bc16f1..7852be65da 100644
--- a/Formula/elasticsearch.rb
+++ b/Formula/elasticsearch.rb
@@ -13,6 +13,9 @@ class Elasticsearch < Formula
 
   depends_on :java => "1.8+"
 
+  conflicts_with "elasticsearch@1.7", :because => "Different versions of same formula"
+  conflicts_with "elasticsearch@2.4", :because => "Different versions of same formula"
+
   def cluster_name
     "elasticsearch_#{ENV["USER"]}"
   end