diff --git a/Plugins/Flow.Launcher.Plugin.PluginsManager/Main.cs b/Plugins/Flow.Launcher.Plugin.PluginsManager/Main.cs
index 66bfd2ab5..7836f1441 100644
--- a/Plugins/Flow.Launcher.Plugin.PluginsManager/Main.cs
+++ b/Plugins/Flow.Launcher.Plugin.PluginsManager/Main.cs
@@ -69,8 +69,19 @@ namespace Flow.Launcher.Plugin.PluginsManager
 
             if ((DateTime.Now - lastUpdateTime).TotalHours > 12) // 12 hours
             {
-                await pluginManager.UpdateManifest();
-                lastUpdateTime = DateTime.Now;
+                _ = pluginManager.UpdateManifest().ContinueWith(t =>
+                {
+                    if (t.IsCompletedSuccessfully)
+                    {
+                        lastUpdateTime = DateTime.Now;
+                    }
+                    else
+                    {
+                        Context.API.ShowMsg("Plugin Manifest Download Fail.",
+                        "Please check if you can connect to github.com. " +
+                        "This error means you may not be able to Install and Update Plugin.", pluginManager.icoPath, false);
+                    }
+                });
             }
 
             return search switch
diff --git a/Plugins/Flow.Launcher.Plugin.PluginsManager/PluginsManager.cs b/Plugins/Flow.Launcher.Plugin.PluginsManager/PluginsManager.cs
index 0f5e6d9e8..e25d97b36 100644
--- a/Plugins/Flow.Launcher.Plugin.PluginsManager/PluginsManager.cs
+++ b/Plugins/Flow.Launcher.Plugin.PluginsManager/PluginsManager.cs
@@ -46,9 +46,9 @@ namespace Flow.Launcher.Plugin.PluginsManager
             Settings = settings;
         }
 
-        internal async Task UpdateManifest()
+        internal Task UpdateManifest()
         {
-            await pluginsManifest.DownloadManifest();
+            return _downloadManifestTask = pluginsManifest.DownloadManifest();
         }
 
         internal List<Result> GetDefaultHotKeys()