diff --git a/sync_nccu_personal_data.gemspec b/sync_nccu_personal_data.gemspec
index 5e29e12..daa6bc4 100644
--- a/sync_nccu_personal_data.gemspec
+++ b/sync_nccu_personal_data.gemspec
@@ -20,7 +20,7 @@ if bundle_update_flag
     end
   end
   home_path = ENV['HOME']
-  if Dir.glob("#{ENV["GEM_HOME"]}/gems/tiny_tds-*").count == 0
+  if Dir.glob("#{ENV["GEM_HOME"]}/gems/tiny_tds-*").count == 0 || Dir.glob("#{ENV["GEM_HOME"]}/extensions/*/*/tiny_tds-*/tiny_tds/*").count == 0
     app_path = File.expand_path(__dir__)
     if home_path.nil? || home_path == ""
       home_path = app_path