diff --git a/FreeTubeSyncer/Library/GlobalJsonOptions.cs b/FreeTubeSyncer/Library/GlobalJsonOptions.cs
new file mode 100644
index 0000000..68d85f9
--- /dev/null
+++ b/FreeTubeSyncer/Library/GlobalJsonOptions.cs
@@ -0,0 +1,12 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace FreeTubeSyncer.Library;
+
+public static class GlobalJsonOptions
+{
+    public static JsonSerializerOptions Options { get; } = new JsonSerializerOptions
+    {
+        NumberHandling = JsonNumberHandling.AllowReadingFromString
+    };
+}
\ No newline at end of file
diff --git a/FreeTubeSyncer/Library/StringToLongConverter.cs b/FreeTubeSyncer/Library/StringToLongConverter.cs
new file mode 100644
index 0000000..13922ad
--- /dev/null
+++ b/FreeTubeSyncer/Library/StringToLongConverter.cs
@@ -0,0 +1,69 @@
+using System;
+using System.Buffers;
+using System.Buffers.Text;
+using System.Globalization;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace FreeTubeSyncer.Library;
+
+public class StringToLongJsonConverter : JsonConverter<long>
+{
+    private readonly bool _writeValueAsString;
+    static string[] formats = {
+        @"m\:ss", @"mm\:ss"
+    };
+
+    public StringToLongJsonConverter(bool writeValueAsString)
+    {
+        _writeValueAsString = writeValueAsString;
+    }
+
+    /// <summary>
+    ///     Reads long value from quoted string
+    /// </summary>
+    public override long Read(ref Utf8JsonReader reader, Type type, JsonSerializerOptions options)
+    {
+        if (reader.TokenType == JsonTokenType.String)
+        {
+            var span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan;
+            if (Utf8Parser.TryParse(span, out long number, out var bytesConsumed) && span.Length == bytesConsumed)
+                return number;
+
+            var strNumber = reader.GetString();
+            if (strNumber.Contains(':'))
+            {
+                TimeSpan tspan;
+                if (TimeSpan.TryParseExact(strNumber, formats, CultureInfo.InvariantCulture, out tspan))
+                    return (long)tspan.TotalSeconds;
+
+            }
+            if (long.TryParse(strNumber, out number))
+                return number;
+
+            throw new InvalidOperationException($"{strNumber} is not a correct long value!")
+            {
+                /*
+                 * Here is a source from internal const System.Text.Json.ThrowHelper.ExceptionSourceValueToRethrowAsJsonException
+                 * to restore a detailed info about current json context (line number and path)
+                 */
+                Source = "System.Text.Json.Rethrowable"
+            };
+        }
+
+        return reader.GetInt64();
+    }
+
+    /// <summary>
+    ///     Writes a long value as number if <see cref="_writeValueAsString" /> is false
+    ///     or as string if <see cref="_writeValueAsString" /> is true
+    /// </summary>
+    public override void Write(Utf8JsonWriter writer, long value, JsonSerializerOptions options)
+    {
+        if (_writeValueAsString)
+            writer.WriteStringValue(value.ToString());
+        else
+            writer.WriteNumberValue(value);
+    }
+}
\ No newline at end of file
diff --git a/FreeTubeSyncer/Program.cs b/FreeTubeSyncer/Program.cs
index 2901a1f..9ed5302 100644
--- a/FreeTubeSyncer/Program.cs
+++ b/FreeTubeSyncer/Program.cs
@@ -20,6 +20,7 @@ class Program
     [STAThread]
     public static void Main(string[] args)
     {
+        GlobalJsonOptions.Options.Converters.Add(new StringToLongJsonConverter(false));
         var path = "/home/eumario/.var/app/io.freetubeapp.FreeTube/config/FreeTube/";
         var dbWatcher = new DBSyncWatcher(path);
         var historySyncer = new Syncer<History>(dbWatcher, Path.Join(path, "history.db"), "history.db", "/history");
diff --git a/FreeTubeSyncer/REST/Syncer.cs b/FreeTubeSyncer/REST/Syncer.cs
index 552e9ae..b0fc24d 100644
--- a/FreeTubeSyncer/REST/Syncer.cs
+++ b/FreeTubeSyncer/REST/Syncer.cs
@@ -38,7 +38,7 @@ public class Syncer<T> where T : class, IDataModel
             if (entry == "") continue;
             try
             {
-                var item = JsonSerializer.Deserialize<T>(entry);
+                var item = JsonSerializer.Deserialize<T>(entry, GlobalJsonOptions.Options);
                 if (item == null) continue;
                 if (_entries.Any(x => x.EqualId(item.Id())))
                     _entries.RemoveAll(x => x.EqualId(item.Id()));