diff --git a/src/lib-csharp/UpdateManager.cs b/src/lib-csharp/UpdateManager.cs
index 2e55f0d9..27305fb3 100644
--- a/src/lib-csharp/UpdateManager.cs
+++ b/src/lib-csharp/UpdateManager.cs
@@ -233,7 +233,7 @@ namespace Velopack
             }
 
             EnsureInstalled();
-            using var _mut = AcquireUpdateLock();
+            using var _mut = await AcquireUpdateLock();
 
             var appTempDir = Locator.AppTempDir!;