diff --git a/BililiveRecorder.Flv/Pipeline/Rules/UpdateTimestampJumpRule.cs b/BililiveRecorder.Flv/Pipeline/Rules/UpdateTimestampJumpRule.cs
index 6be6402..6be3748 100644
--- a/BililiveRecorder.Flv/Pipeline/Rules/UpdateTimestampJumpRule.cs
+++ b/BililiveRecorder.Flv/Pipeline/Rules/UpdateTimestampJumpRule.cs
@@ -14,7 +14,7 @@ namespace BililiveRecorder.Flv.Pipeline.Rules
     {
         private const string TS_STORE_KEY = "Timestamp_Store_Key";
 
-        private const int JUMP_THRESHOLD = 50;
+        private const int JUMP_THRESHOLD = 500;
 
         private const int AUDIO_DURATION_FALLBACK = 22;
         private const int AUDIO_DURATION_MIN = 20;
@@ -40,7 +40,7 @@ namespace BililiveRecorder.Flv.Pipeline.Rules
                     var tags = dataAction.Tags;
                     var currentTimestamp = tags[0].Timestamp;
 
-                    bool isFirstChunk = ts.FirstChunk;
+                    var isFirstChunk = ts.FirstChunk;
                     if (isFirstChunk)
                     {
                         // 第一段数据使用最小的时间戳作为基础偏移量
@@ -75,7 +75,7 @@ namespace BililiveRecorder.Flv.Pipeline.Rules
                 {
                     var tag = endAction.Tag;
                     var diff = tag.Timestamp - ts.LastOriginal;
-                    if (diff < 0 || diff > JUMP_THRESHOLD)
+                    if (diff is < 0 or > JUMP_THRESHOLD)
                     {
                         tag.Timestamp = ts.NextTimestampTarget;
                     }
diff --git a/test/BililiveRecorder.Flv.Tests/RuleTests/IntegratedGoodTests.cs b/test/BililiveRecorder.Flv.Tests/RuleTests/IntegratedGoodTests.cs
index 25544f0..c3633cb 100644
--- a/test/BililiveRecorder.Flv.Tests/RuleTests/IntegratedGoodTests.cs
+++ b/test/BililiveRecorder.Flv.Tests/RuleTests/IntegratedGoodTests.cs
@@ -58,7 +58,7 @@ namespace BililiveRecorder.Flv.Tests.RuleTests
             var originalTags = SampleFileLoader.LoadXmlFlv(path).Tags;
 
             var random = new System.Random();
-            var offset = random.Next(51, 9999);
+            var offset = random.Next(501, 9999);
             if (random.Next(2) == 1)
                 offset = -offset;