diff --git a/npm/preview-publish.ps1 b/npm/preview-publish.ps1
index c3a15f356b..f10173226b 100644
--- a/npm/preview-publish.ps1
+++ b/npm/preview-publish.ps1
@@ -2,6 +2,8 @@ param(
   [string]$Version
 )
 
+npm install
+
 $NextVersion = $(node get-version.js) + '-preview' + (Get-Date).tostring(“yyyyMMdd”)
 $rootFolder = (Get-Item -Path "./" -Verbose).FullName
 
diff --git a/npm/publish.ps1 b/npm/publish.ps1
index 3f0f03bc51..69f9ece982 100644
--- a/npm/publish.ps1
+++ b/npm/publish.ps1
@@ -2,6 +2,8 @@ param(
   [string]$Version
 )
 
+npm install
+
 $NextVersion = $(node get-version.js)
 $rootFolder = (Get-Item -Path "./" -Verbose).FullName