diff --git a/lib/opensearch/transport/transport/http/faraday.rb b/lib/opensearch/transport/transport/http/faraday.rb
index 3ceb97e47..c11e7c5a1 100644
--- a/lib/opensearch/transport/transport/http/faraday.rb
+++ b/lib/opensearch/transport/transport/http/faraday.rb
@@ -91,7 +91,7 @@ def user_agent_header(client)
                 meta << "#{RbConfig::CONFIG['host_os'].split('_').first[/[a-z]+/i].downcase} #{RbConfig::CONFIG['target_cpu']}"
               end
               meta << client.headers[USER_AGENT_STR].to_s
-              "opensearch-ruby/#{VERSION} (#{meta.join('; ')})"
+              "opensearch-ruby/#{OpenSearch::VERSION} (#{meta.join('; ')})"
             end
           end
         end