diff --git a/builder/build.ps1 b/builder/build.ps1
index 73bc47c..3fcf1ba 100644
--- a/builder/build.ps1
+++ b/builder/build.ps1
@@ -28,7 +28,7 @@ if ($Sign) {
 
 # Building service executable
 Write-Output "Building WinBGP service"
-& ".\service\WinBGP-Service.ps1" -Build
+& "..\service\WinBGP-Service.ps1" -Build
 
 # Building engine
 Write-Output "Building engine"