diff --git a/apps/api/app/admin/admin_users.rb b/apps/api/app/admin/admin_users.rb
index 637fc1c..01a4ebd 100644
--- a/apps/api/app/admin/admin_users.rb
+++ b/apps/api/app/admin/admin_users.rb
@@ -17,7 +17,7 @@ ActiveAdmin.register AdminUser do
   form do |f|
     f.inputs do
       f.input :email
-      f.input :password
+      f.input :password, hint: "Leave blank to keep current password"
       f.input :password_confirmation
       f.input :member_id, as: :select,
               collection: Member.order(:nick).map { |m| [m.nick, m.id] },
@@ -40,5 +40,13 @@ ActiveAdmin.register AdminUser do
     def scoped_collection
       super.includes(:member)
     end
+
+    def update
+      if params[:admin_user][:password].blank?
+        params[:admin_user].delete(:password)
+        params[:admin_user].delete(:password_confirmation)
+      end
+      super
+    end
   end
 end