diff --git a/app/services/filter_service.rb b/app/services/filter_service.rb
index c53dbf8a2..a6cdd409d 100644
--- a/app/services/filter_service.rb
+++ b/app/services/filter_service.rb
@@ -47,11 +47,17 @@ class FilterService
       query_hash['values'].map { |x| Conversation.statuses[x.to_sym] }
     when 'message_type'
       query_hash['values'].map { |x| Message.message_types[x.to_sym] }
+    when 'content'
+      downcase_array_values(query_hash['values'])
     else
       case_insensitive_values(query_hash)
     end
   end
 
+  def downcase_array_values(values)
+    values.map(&:downcase)
+  end
+
   def case_insensitive_values(query_hash)
     if @custom_attribute_type.present? && query_hash['values'][0].is_a?(String)
       string_filter_values(query_hash)