diff --git a/PSParallelPipeline/PSParallelPipeline.psd1 b/PSParallelPipeline/PSParallelPipeline.psd1
index 34f9f74..3e77e0a 100644
--- a/PSParallelPipeline/PSParallelPipeline.psd1
+++ b/PSParallelPipeline/PSParallelPipeline.psd1
@@ -12,7 +12,7 @@
 RootModule = 'PSParallelPipeline.psm1'
 
 # Version number of this module.
-ModuleVersion = '1.0.2'
+ModuleVersion = '1.0.3'
 
 # Supported PSEditions
 # CompatiblePSEditions = @()
diff --git a/PSParallelPipeline/PSParallelPipeline.psm1 b/PSParallelPipeline/PSParallelPipeline.psm1
index b2b7500..b8e07f9 100644
--- a/PSParallelPipeline/PSParallelPipeline.psm1
+++ b/PSParallelPipeline/PSParallelPipeline.psm1
@@ -156,7 +156,10 @@ function Invoke-Parallel {
 
                 $key = [Convert]::ToBase64String([Encoding]::Unicode.GetBytes($varText.ToLower()))
                 if(-not $usingParams.ContainsKey($key)) {
-                    $usingParams.Add($key, $ExecutionContext.SessionState.PSVariable.GetValue($varPath))
+                    # Huge thanks to SeeminglyScience again and again! The function must use
+                    # `$PSCmdlet.SessionState` instead of `$ExecutionContext.SessionState`
+                    # to properly refer to the caller's scope.
+                    $usingParams.Add($key, $PSCmdlet.SessionState.PSVariable.GetValue($varPath))
                 }
             }