diff --git a/CHANGELOG.md b/CHANGELOG.md
index 134d44a..6819450 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 ## 4.4.1 (unreleased)
 
-- Added `stem_exclusion` option
+- Added `stem_exclusion` and `stemmer_override` options
 - Improved error message for `reload_synonyms` with non-OSS version of Elasticsearch
 - Improved output for reindex rake task
 
diff --git a/lib/searchkick/index_options.rb b/lib/searchkick/index_options.rb
index a9ca359..b86dd17 100644
--- a/lib/searchkick/index_options.rb
+++ b/lib/searchkick/index_options.rb
@@ -296,6 +296,23 @@ module Searchkick
         end
       end
 
+      if options[:stemmer_override]
+        stemmer_override = {
+          type: "stemmer_override"
+        }
+        if options[:stemmer_override].is_a?(String)
+          stemmer_override[:rules_path] = options[:stemmer_override]
+        else
+          stemmer_override[:rules] = options[:stemmer_override]
+        end
+        settings[:analysis][:filter][:searchkick_stemmer_override] = stemmer_override
+
+        settings[:analysis][:analyzer].each do |_, analyzer|
+          stemmer_index = analyzer[:filter].index("searchkick_stemmer") if analyzer[:filter]
+          analyzer[:filter].insert(stemmer_index, "searchkick_stemmer_override") if stemmer_index
+        end
+      end
+
       if options[:stem_exclusion]
         settings[:analysis][:filter][:searchkick_stem_exclusion] = {
           type: "keyword_marker",
diff --git a/lib/searchkick/model.rb b/lib/searchkick/model.rb
index 4ab2ece..fbf74a3 100644
--- a/lib/searchkick/model.rb
+++ b/lib/searchkick/model.rb
@@ -6,7 +6,7 @@ module Searchkick
       unknown_keywords = options.keys - [:_all, :_type, :batch_size, :callbacks, :case_sensitive, :conversions, :deep_paging, :default_fields,
         :filterable, :geo_shape, :highlight, :ignore_above, :index_name, :index_prefix, :inheritance, :language,
         :locations, :mappings, :match, :merge_mappings, :routing, :searchable, :search_synonyms, :settings, :similarity,
-        :special_characters, :stem, :stem_conversions, :stem_exclusion, :suggest, :synonyms, :text_end,
+        :special_characters, :stem, :stem_conversions, :stem_exclusion, :stemmer_override, :suggest, :synonyms, :text_end,
         :text_middle, :text_start, :word, :wordnet, :word_end, :word_middle, :word_start]
       raise ArgumentError, "unknown keywords: #{unknown_keywords.join(", ")}" if unknown_keywords.any?
 
diff --git a/test/index_options_test.rb b/test/index_options_test.rb
index adcc8ad..ba97e97 100644
--- a/test/index_options_test.rb
+++ b/test/index_options_test.rb
@@ -39,6 +39,26 @@ class IndexOptionsTest < Minitest::Test
     end
   end
 
+  def test_no_stemmer_override
+    with_options({}) do
+      store_names ["animals", "animations"]
+      assert_search "animals", ["animals", "animations"], {misspellings: false}
+      assert_search "animations", ["animals", "animations"], {misspellings: false}
+      assert_equal ["anim"], Song.search_index.tokens("animations", analyzer: "searchkick_index")
+      assert_equal ["anim"], Song.search_index.tokens("animations", analyzer: "searchkick_search2")
+    end
+  end
+
+  def test_stemmer_override
+    with_options({stemmer_override: ["animations => animat"]}) do
+      store_names ["animals", "animations"]
+      assert_search "animals", ["animals"], {misspellings: false}
+      assert_search "animations", ["animations"], {misspellings: false}
+      assert_equal ["animat"], Song.search_index.tokens("animations", analyzer: "searchkick_index")
+      assert_equal ["animat"], Song.search_index.tokens("animations", analyzer: "searchkick_search2")
+    end
+  end
+
   def test_special_characters
     with_options({special_characters: false}) do
       store_names ["jalapeño"]
--
libgit2 0.21.0