diff --git a/FFMpegCore/FFProbe/FFProbeAnalysis.cs b/FFMpegCore/FFProbe/FFProbeAnalysis.cs
index 09a1cd9..1966242 100644
--- a/FFMpegCore/FFProbe/FFProbeAnalysis.cs
+++ b/FFMpegCore/FFProbe/FFProbeAnalysis.cs
@@ -153,7 +153,7 @@ public class Chapter : ITagsContainer
         public string EndTime { get; set; } = null!;
 
         [JsonPropertyName("tags")]
-        public Dictionary<string, string> Tags { get; set; } = null!;
+        public Dictionary<string, string>? Tags { get; set; }
     }
 
     public interface IDispositionContainer