diff --git a/app/controllers/web_key_directory_controller.rb b/app/controllers/web_key_directory_controller.rb
index 593a62f..2809728 100644
--- a/app/controllers/web_key_directory_controller.rb
+++ b/app/controllers/web_key_directory_controller.rb
@@ -6,7 +6,7 @@ class WebKeyDirectoryController < WellKnownController
     @user = User.find_by(cn: params[:l].downcase)
 
     if @user.nil? ||
-       @user.pgp_pubkey.empty? ||
+       @user.pgp_pubkey.blank? ||
        !@user.pgp_pubkey_contains_user_address?
       http_status :not_found and return
     end