diff --git a/HelperFunctions.ps1 b/HelperFunctions.ps1
index 66914ee7f..6a4a6197a 100644
--- a/HelperFunctions.ps1
+++ b/HelperFunctions.ps1
@@ -1327,8 +1327,12 @@ function DownloadLatestAlLanguageExtension {
         }
     }
 
-    $mutexName = "DownloadAlLanguageExtension"
-    $mutex = New-Object System.Threading.Mutex($false, $mutexName)
+    $mutexName = "Global\DownloadAlLanguageExtension"
+    $createdNew = $false
+    $security = New-Object System.Security.AccessControl.MutexSecurity
+    $rule = New-Object System.Security.AccessControl.MutexAccessRule([System.Security.Principal.SecurityIdentifier]::new([System.Security.Principal.WellKnownSidType]::WorldSid, $null), [System.Security.AccessControl.MutexRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow)
+    $security.AddAccessRule($rule)
+    $mutex = New-Object System.Threading.Mutex($false, $mutexName, [ref]$createdNew, $security)
     try {
         try {
             if (!$mutex.WaitOne(1000)) {
diff --git a/ReleaseNotes.txt b/ReleaseNotes.txt
index d47cde894..37eefafc8 100644
--- a/ReleaseNotes.txt
+++ b/ReleaseNotes.txt
@@ -1,6 +1,8 @@
 6.1.16
+Fixed DownloadLatestAlLanguageExtension concurrency mutex exception
 
 6.1.15
+Add retry with exponential backoff in DockerDo for transient MCR pull failures caused by Azure Front Door CDN/WAF blocks
 New-BcCompilerFolder: Add platformArtifactUrl parameter to allow using a different platform than the one related to artifactUrl (like New-BcContainer)
 Add retry with exponential backoff in DockerDo for transient MCR pull failures caused by Azure Front Door CDN/WAF blocks (delays: 5s, 15s, 30s, 60s, 120s)
 Add support for framework-dependent AL Language VSIX (flat bin/ layout without platform-specific subdirectories)