diff --git a/Directory.Build.props b/Directory.Build.props
index 0c6ec45..e961946 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <Version>1.0.2</Version>
+    <Version>1.0.3</Version>
     <Authors>Tudor Stanciu</Authors>
     <Company>STA</Company>
     <PackageTags>GoDaddyDDNS</PackageTags>
diff --git a/README.md b/README.md
index 174cca9..64fec6d 100644
--- a/README.md
+++ b/README.md
@@ -21,3 +21,9 @@ To make this worker functional, a minimum configuration is required:
 ## Stack
 * .NET (C#)
 * Docker
+
+## Changelog
+**1.0.0** - The first release version of the service.
+**1.0.1** - ConfigureAwait(false) was set for the http client get async calls.
+**1.0.2** - .NET 6 upgrade.
+**1.0.3** - The ```ExecutionTimeInSeconds``` parameter has been replaced with ```ExecutionFrequency``` which accepts values in the format ```30s```, ```10m```, ```1h``` or ```1d```.
\ No newline at end of file
diff --git a/src/GoDaddyDDNS/Utils/TimeSpanUtils.cs b/src/GoDaddyDDNS/Utils/TimeSpanUtils.cs
new file mode 100644
index 0000000..d28034d
--- /dev/null
+++ b/src/GoDaddyDDNS/Utils/TimeSpanUtils.cs
@@ -0,0 +1,37 @@
+using System;
+using System.Text.RegularExpressions;
+
+namespace GoDaddyDDNS.Utils
+{
+    internal static class TimeSpanUtils
+    {
+        public static TimeSpan ParseTimeInterval(string timeInterval)
+        {
+            if (string.IsNullOrEmpty(timeInterval))
+                throw new ArgumentException("Time interval cannot be null or empty.");
+
+            var formatRegex = new Regex(@"^(\d+)([smhd])$", RegexOptions.IgnoreCase);
+            var match = formatRegex.Match(timeInterval);
+
+            if (!match.Success)
+                throw new ArgumentException("Invalid time interval format. Use format like '30s', '10m', '1h', or '1d'.");
+
+            var value = int.Parse(timeInterval.Substring(0, timeInterval.Length - 1));
+            var unit = timeInterval.Substring(timeInterval.Length - 1).ToLower();
+
+            switch (unit)
+            {
+                case "s": // seconds
+                    return TimeSpan.FromSeconds(value);
+                case "m": // minutes
+                    return TimeSpan.FromMinutes(value);
+                case "h": // hours
+                    return TimeSpan.FromHours(value);
+                case "d": // days
+                    return TimeSpan.FromDays(value);
+                default:
+                    throw new ArgumentException("Invalid time interval unit.");
+            }
+        }
+    }
+}
diff --git a/src/GoDaddyDDNS/Worker.cs b/src/GoDaddyDDNS/Worker.cs
index 27922fc..f210aa2 100644
--- a/src/GoDaddyDDNS/Worker.cs
+++ b/src/GoDaddyDDNS/Worker.cs
@@ -1,4 +1,5 @@
 using GoDaddyDDNS.Abstractions;
+using GoDaddyDDNS.Utils;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
@@ -12,15 +13,15 @@ namespace GoDaddyDDNS
     {
         private readonly ILogger<Worker> _logger;
         private readonly IDynamicDNSService _dynamicDNSService;
-        private readonly int _delay;
+        private readonly TimeSpan _delay;
 
         public Worker(ILogger<Worker> logger, IDynamicDNSService dynamicDNSService, IConfiguration configuration)
         {
             _logger=logger;
             _dynamicDNSService=dynamicDNSService;
 
-            var delayInSeconds = configuration.GetValue<int>("ExecutionTimeInSeconds");
-            _delay = Convert.ToInt32(TimeSpan.FromSeconds(delayInSeconds).TotalMilliseconds);
+            var delay = configuration.GetValue<string>("ExecutionFrequency");
+            _delay = TimeSpanUtils.ParseTimeInterval(delay);
         }
 
         protected override async Task ExecuteAsync(CancellationToken stoppingToken)
diff --git a/src/GoDaddyDDNS/appsettings.json b/src/GoDaddyDDNS/appsettings.json
index 6881c7f..e2ec8bc 100644
--- a/src/GoDaddyDDNS/appsettings.json
+++ b/src/GoDaddyDDNS/appsettings.json
@@ -17,5 +17,5 @@
   "Records": [ "@" ],
   "Key": "*********",
   "Secret": "*********",
-  "ExecutionTimeInSeconds": 60
+  "ExecutionFrequency": "60s"
 }