diff --git a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
index a55cfaa..9dd91f7 100644
--- a/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
+++ b/src/N_m3u8DL-RE/CommandLine/CommandInvoker.cs
@@ -37,7 +37,7 @@ namespace N_m3u8DL_RE.CommandLine
         private readonly static Option<SubtitleFormat> SubtitleFormat = new(name: "--sub-format", description: ResString.cmd_subFormat, getDefaultValue: () => Enum.SubtitleFormat.SRT);
         private readonly static Option<bool> AutoSelect = new(new string[] { "--auto-select" }, description: ResString.cmd_autoSelect, getDefaultValue: () => false);
         private readonly static Option<bool> SubOnly = new(new string[] { "--sub-only" }, description: ResString.cmd_subOnly, getDefaultValue: () => false);
-        private readonly static Option<int> ThreadCount = new(new string[] { "--thread-count" }, description: ResString.cmd_threadCount, getDefaultValue: () => 8) { ArgumentHelpName = "number" };
+        private readonly static Option<int> ThreadCount = new(new string[] { "--thread-count" }, description: ResString.cmd_threadCount, getDefaultValue: () => Environment.ProcessorCount) { ArgumentHelpName = "number" };
         private readonly static Option<int> DownloadRetryCount = new(new string[] { "--download-retry-count" }, description: ResString.cmd_downloadRetryCount, getDefaultValue: () => 3) { ArgumentHelpName = "number" };
         private readonly static Option<bool> SkipMerge = new(new string[] { "--skip-merge" }, description: ResString.cmd_skipMerge, getDefaultValue: () => false);
         private readonly static Option<bool> SkipDownload = new(new string[] { "--skip-download" }, description: ResString.cmd_skipDownload, getDefaultValue: () => false);