diff --git a/contract/passtorage.go b/contract/passtorage.go
index 13f921d..e17c295 100644
--- a/contract/passtorage.go
+++ b/contract/passtorage.go
@@ -30,3 +30,13 @@ func DeleteUser(login string) {
 	ctx := storage.GetContext()
 	storage.Delete(ctx, login)
 }
+
+func UpdateUser(login string, password interop.Hash256) {
+	ctx := storage.GetContext()
+	storedValue := storage.Get(ctx, login).(interop.Hash256)
+	if storedValue == nil {
+		panic("This user does not exist")
+	} else {
+		storage.Put(ctx, login, password)
+	}
+}