diff --git a/lib/searchkick/index.rb b/lib/searchkick/index.rb
index 0831283..b00b5ef 100644
--- a/lib/searchkick/index.rb
+++ b/lib/searchkick/index.rb
@@ -642,7 +642,7 @@ module Searchkick
       source = source.each_with_object({}) { |(k, v), memo| memo[k.to_s] = v; memo }.except("_id")
 
       # conversions
-      Array(options[:conversions]).each do |conversions_field|
+      Array(options[:conversions]).map(&:to_s).each do |conversions_field|
         if source[conversions_field]
           source[conversions_field] = source[conversions_field].map { |k, v| {query: k, count: v} }
         end
diff --git a/lib/searchkick/query.rb b/lib/searchkick/query.rb
index a1e1397..7dd8502 100644
--- a/lib/searchkick/query.rb
+++ b/lib/searchkick/query.rb
@@ -168,7 +168,7 @@ module Searchkick
       # model and eager loading
       load = options[:load].nil? ? true : options[:load]
 
-      conversions_fields = Array(options[:conversions] || searchkick_options[:conversions])
+      conversions_fields = Array(options[:conversions] || searchkick_options[:conversions]).map(&:to_s)
       personalize_field  = searchkick_options[:personalize]
 
       all = term == "*"
diff --git a/test/test_helper.rb b/test/test_helper.rb
index fe3e77e..4d0e17f 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -277,9 +277,9 @@ class Product
     ],
     autocomplete: [:name],
     suggest: [:name, :color],
-    conversions: "conversions",
-    personalize: "user_ids",
-    locations: ["location", "multiple_locations"],
+    conversions: [:conversions],
+    personalize: :user_ids,
+    locations: [:location, :multiple_locations],
     text_start: [:name],
     text_middle: [:name],
     text_end: [:name],
--
libgit2 0.21.0