diff --git a/FFMpegCore/FFProbe/FFProbeAnalysis.cs b/FFMpegCore/FFProbe/FFProbeAnalysis.cs
index 1185998..8bf17ec 100644
--- a/FFMpegCore/FFProbe/FFProbeAnalysis.cs
+++ b/FFMpegCore/FFProbe/FFProbeAnalysis.cs
@@ -84,7 +84,7 @@ public class Tags
     public class Format
     {
         [JsonPropertyName("filename")]
-        public string Filename { get; set; }
+        public string Filename { get; set; } = null!;
 
         [JsonPropertyName("nb_streams")]
         public int NbStreams { get; set; }
@@ -93,27 +93,27 @@ public class Format
         public int NbPrograms { get; set; }
 
         [JsonPropertyName("format_name")]
-        public string FormatName { get; set; }
+        public string FormatName { get; set; } = null!;
 
         [JsonPropertyName("format_long_name")]
-        public string FormatLongName { get; set; }
+        public string FormatLongName { get; set; } = null!;
 
         [JsonPropertyName("start_time")]
-        public string StartTime { get; set; }
+        public string StartTime { get; set; } = null!;
 
         [JsonPropertyName("duration")]
-        public string Duration { get; set; }
+        public string Duration { get; set; } = null!;
 
         [JsonPropertyName("size")]
-        public string Size { get; set; }
+        public string Size { get; set; } = null!;
 
         [JsonPropertyName("bit_rate")]
-        public string BitRate { get; set; }
+        public string BitRate { get; set; } = null!;
 
         [JsonPropertyName("probe_score")]
         public int ProbeScore { get; set; }
 
         [JsonPropertyName("tags")]
-        public Tags Tags { get; set; }
+        public Tags Tags { get; set; } = null!;
     }
 }
diff --git a/FFMpegCore/FFProbe/MediaFormat.cs b/FFMpegCore/FFProbe/MediaFormat.cs
index 60c89b8..ea5c6f3 100644
--- a/FFMpegCore/FFProbe/MediaFormat.cs
+++ b/FFMpegCore/FFProbe/MediaFormat.cs
@@ -5,8 +5,8 @@ namespace FFMpegCore
     public class MediaFormat
     {
         public TimeSpan Duration { get; set; }
-        public string FormatName { get; set; }
-        public string FormatLongName { get; set; }
+        public string FormatName { get; set; } = null!;
+        public string FormatLongName { get; set; } = null!;
         public int StreamCount { get; set; }
         public double ProbeScore { get; set; }
         public double BitRate { get; set; }