diff --git a/eng/common/testproxy/scripts/override-proxy-version.ps1 b/eng/common/testproxy/scripts/override-proxy-version.ps1
index d1e6ff5bfa37..031b0c17f083 100644
--- a/eng/common/testproxy/scripts/override-proxy-version.ps1
+++ b/eng/common/testproxy/scripts/override-proxy-version.ps1
@@ -10,7 +10,7 @@ param(
    [Parameter(mandatory=$true)] [string] $TargetVersion
 )
 
-$versionFile = Join-Path $PSScriptRoot "target_version.txt"
+$versionFile = Join-Path $PSScriptRoot ".." "target_version.txt"
 $existingVersionText = Get-Content -Raw -Path $versionFile
 $existingVersion = $existingVersionText.Trim()