diff --git a/src/util/aws/lambda.js b/src/util/aws/lambda.js
index d7af36a..055df02 100644
--- a/src/util/aws/lambda.js
+++ b/src/util/aws/lambda.js
@@ -86,7 +86,7 @@ export async function updateFunction (oldFunction, wantedFunction) {
   await loadRegion()
   const lambda = new AWS.Lambda()
   const { FunctionName } = oldFunction
-  const Alias = wantedFunction.Identifier.Alias || oldFunction.Identifier.Alias
+  const Alias = wantedFunction.hasOwnProperty('Identifier') ? wantedFunction.Identifier.Alias || oldFunction.Identifier.Alias : oldFunction.Identifier.Alias
   const updateCodeParams = { FunctionName }
   const updateConfigParams = { FunctionName }
   const publishVersionParams = { FunctionName }