diff --git a/Barsik.csproj b/Barsik.csproj
index 7147de0..b0b65bf 100644
--- a/Barsik.csproj
+++ b/Barsik.csproj
@@ -2,13 +2,12 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
     <ApplicationIcon />
     <StartupObject>Barsik.Program</StartupObject>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ini-parser" Version="2.5.2" />
     <PackageReference Include="NLog" Version="4.7.4" />
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta1.20574.7" />
   </ItemGroup>
diff --git a/MDStatMonitoringUnit.cs b/MDStatMonitoringUnit.cs
index 53ccbae..88182ef 100644
--- a/MDStatMonitoringUnit.cs
+++ b/MDStatMonitoringUnit.cs
@@ -1,8 +1,8 @@
-using IniParser.Model;
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Text;
+using System.Text.Json;
 using System.Threading;
 
 namespace Barsik
@@ -21,7 +21,7 @@ namespace Barsik
 	/// </summary>
 	class MDStatMonitoringUnit : BaseMonitoringUnit
 	{
-		public MDStatMonitoringUnit(SectionData config, RegistersContainer registers) : base(config, registers)
+		public MDStatMonitoringUnit(JsonElement config, RegistersContainer registers) : base(config, registers)
 		{
 		}
 
diff --git a/MonitoringUnit.cs b/MonitoringUnit.cs
index 88c5f4c..23caff9 100644
--- a/MonitoringUnit.cs
+++ b/MonitoringUnit.cs
@@ -1,29 +1,29 @@
-using IniParser.Model;
-using System;
+using System;
+using System.Text.Json;
 
 namespace Barsik
 {
     class BaseMonitoringUnit
     {
-        protected SectionData config;
+        protected JsonElement config;
         protected RegistersContainer registers;
 
         protected int baseAddress;
 
-        public BaseMonitoringUnit(SectionData config, RegistersContainer registers)
+        public BaseMonitoringUnit(JsonElement config, RegistersContainer registers)
         {
-            this.config = config;
+            this.config = config.Clone();
             this.registers = registers;
-            baseAddress = int.Parse(config.Keys["BaseAddress"]);
+            baseAddress = config.GetProperty("BaseAddress").GetInt32();
         }
 
         public virtual void Run()
         {
         }
 
-        public static BaseMonitoringUnit Create(SectionData config, RegistersContainer registers)
+        public static BaseMonitoringUnit Create(JsonElement config, RegistersContainer registers)
         {
-            var type = config.Keys["Type"];
+            var type = config.GetProperty("Type").GetString();
             if (type == "Sensors")
             {
                 return new SensorsMonitoringUnit(config, registers);
diff --git a/Program.cs b/Program.cs
index acbed3f..aa7a99a 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,11 +1,11 @@
-using IniParser;
-using NLog;
+using NLog;
 using System.Collections.Generic;
 using System.CommandLine;
 using System.CommandLine.Invocation;
 using System.Globalization;
 using System.IO;
 using System.Reflection;
+using System.Text.Json;
 using System.Threading;
 
 namespace Barsik
@@ -30,7 +30,7 @@ namespace Barsik
             rootCommand.InvokeAsync(args).Wait();
         }
 
-        static void RunService(string configPath)
+        static void RunService(string config)
 		{
             Logging.Setup();
             logger.Info("Barsik monitoring service starting");
@@ -39,18 +39,20 @@ namespace Barsik
             var server = new ModbusServer(registers);
             units = new List<BaseMonitoringUnit>();
 
-            var configParser = new FileIniDataParser();
-            if (string.IsNullOrEmpty(configPath))
+            if (string.IsNullOrEmpty(config))
             {
                 string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
-                configPath = Path.Combine(assemblyFolder, "barsik.ini");
+                config = Path.Combine(assemblyFolder, "barsik.json");
             }
-            var data = configParser.ReadFile(configPath);
-            foreach (var section in data.Sections)
+            string configStr = File.ReadAllText(config);
+            int port = 0;
+            using (JsonDocument doc = JsonDocument.Parse(configStr))
             {
-                if (section.SectionName.StartsWith("Unit"))
+                var root = doc.RootElement;
+                port = root.GetProperty("Port").GetInt32();
+                foreach (var unitElement in root.GetProperty("Units").EnumerateArray())
                 {
-                    var unit = BaseMonitoringUnit.Create(section, registers);
+                    var unit = BaseMonitoringUnit.Create(unitElement, registers);
                     if (unit != null)
                     {
                         units.Add(unit);
@@ -60,7 +62,7 @@ namespace Barsik
                 }
             }
             logger.Info("Configuration loaded, we have " + units.Count + " units");
-            server.Port = int.Parse(data["Server"]["Port"]);
+            server.Port = port;
             server.Run();
             logger.Info("Exiting");
         }
diff --git a/SensorsMonitoringUnit.cs b/SensorsMonitoringUnit.cs
index b5cd164..4c4fcca 100644
--- a/SensorsMonitoringUnit.cs
+++ b/SensorsMonitoringUnit.cs
@@ -1,5 +1,5 @@
-using IniParser.Model;
-using System;
+using System;
+using System.Text.Json;
 using System.Threading;
 
 namespace Barsik
@@ -12,14 +12,14 @@ namespace Barsik
 	{
 		const string CORE_STR = "Core{0} Temp:";
 
-		public SensorsMonitoringUnit(SectionData config, RegistersContainer registers) : base(config, registers)
+		public SensorsMonitoringUnit(JsonElement config, RegistersContainer registers) : base(config, registers)
 		{
 		}
 
 		public override void Run()
 		{
-			int cores = int.Parse(config.Keys["Cores"]);
-			var multiplier = float.Parse(config.Keys["Multiplier"]);
+			int cores = config.GetProperty("Cores").GetInt32();
+			var multiplier = config.GetProperty("Multiplier").GetDouble();
 			while (true)
 			{
 				System.Diagnostics.ProcessStartInfo procStartInfo = new System.Diagnostics.ProcessStartInfo("sensors");
diff --git a/barsik.ini.sample b/barsik.ini.sample
deleted file mode 100644
index 71280e9..0000000
--- a/barsik.ini.sample
+++ /dev/null
@@ -1,12 +0,0 @@
-[Server]
-Port = 4500
-
-[Unit_CPU]
-Type = Sensors
-BaseAddress = 1
-Multiplier = 100
-Cores = 2
-
-[Unit_RAID]
-Type = MDStat
-BaseAddress = 3
diff --git a/barsik.json.sample b/barsik.json.sample
new file mode 100644
index 0000000..694665f
--- /dev/null
+++ b/barsik.json.sample
@@ -0,0 +1,17 @@
+{
+	"Port": 4500,
+	"Units": [
+		{
+			"Name": "CPU",
+			"Type": "Sensors",
+			"BaseAddress": 1,
+			"Multiplier": 100,
+			"Cores": 2
+		},
+		{
+			"Name": "RAID",
+			"Type": "MDStat", 
+			"BaseAddress": 3
+		}
+	]
+}