diff --git a/lib/searchkick/index_options.rb b/lib/searchkick/index_options.rb
index 7c75b13..a2783b6 100644
--- a/lib/searchkick/index_options.rb
+++ b/lib/searchkick/index_options.rb
@@ -190,6 +190,7 @@ module Searchkick
           # - Only apply the synonym expansion at index time
           # - Don't have the synonym filter applied search
           # - Use directional synonyms where appropriate. You want to make sure that you're not injecting terms that are too general.
+          settings[:analysis][:analyzer][default_analyzer][:filter].insert(4, "searchkick_synonym") if below60
           settings[:analysis][:analyzer][default_analyzer][:filter] << "searchkick_synonym"
 
           %w(word_start word_middle word_end).each do |type|
--
libgit2 0.21.0