diff --git a/appveyor.yml b/appveyor.yml
index da703888..5c19b3fc 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,13 +13,13 @@ build_script:
     {
       $target = "AppVeyorBuild"
       echo "target: $target"
-      .\build.ps1 -Target "$target" -Configuration $env:configuration -ScriptArgs '-isDryRun=true'
+      .\build.ps1 -Target "$target" -Configuration $env:configuration -ScriptArgs '--isDryRun=true'
     }
     else
     {
       $target = $env:target
       echo "target: $target"
-      .\build.ps1 -Target "$target" -Configuration $env:configuration -ScriptArgs '-isDryRun=false -gitHubUserAccount="$env:gitHubUserAccount" -gitHubToken="$env:gitHubToken" -chocolateyToken="$env:chocolateyToken"'
+      .\build.ps1 -Target "$target" -Configuration $env:configuration -ScriptArgs '--isDryRun=false --gitHubUserAccount="$env:gitHubUserAccount" --gitHubToken="$env:gitHubToken" --chocolateyToken="$env:chocolateyToken"'
     }
 
 test: off