diff --git a/src/Madev.Utils.Infrastructure.Hangfire/Attributes/AllowedExecutionTimeRangeAttribute.cs b/src/Madev.Utils.Infrastructure.Hangfire/Attributes/AllowedExecutionTimeRangeAttribute.cs
index 99943d0..3c78207 100644
--- a/src/Madev.Utils.Infrastructure.Hangfire/Attributes/AllowedExecutionTimeRangeAttribute.cs
+++ b/src/Madev.Utils.Infrastructure.Hangfire/Attributes/AllowedExecutionTimeRangeAttribute.cs
@@ -1,73 +1,76 @@
-using System.Globalization;
+using System;
+using System.Globalization;
 using Hangfire.Common;
 using Hangfire.States;
 
-namespace Madev.Utils.Infrastructure.Hangfire.Attributes;
-
-public class AllowedExecutionTimeRangeAttribute : JobFilterAttribute, IElectStateFilter
+namespace Madev.Utils.Infrastructure.Hangfire.Attributes
 {
-    private readonly TimeSpan _timeFrom;
-    private readonly TimeSpan _timeTo;
 
-    /// <summary>
-    /// Allows to run tasks only at a time interval
-    /// </summary>
-    /// <param name="timeFrom">Time from (HH:mm:ss)</param>
-    /// <param name="timeTo">Time to (HH:mm:ss)</param>
-    public AllowedExecutionTimeRangeAttribute(string timeFrom, string timeTo)
+    public class AllowedExecutionTimeRangeAttribute : JobFilterAttribute, IElectStateFilter
     {
-        _timeFrom = DateTime.ParseExact(timeFrom, "HH:mm:ss", CultureInfo.InvariantCulture).TimeOfDay;
-        _timeTo = DateTime.ParseExact(timeTo, "HH:mm:ss", CultureInfo.InvariantCulture).TimeOfDay;
-    }
+        private readonly TimeSpan _timeFrom;
+        private readonly TimeSpan _timeTo;
 
-    public void OnStateElection(ElectStateContext context)
-    {
-        if (context.CurrentState != EnqueuedState.StateName) return;
+        /// <summary>
+        /// Allows to run tasks only at a time interval
+        /// </summary>
+        /// <param name="timeFrom">Time from (HH:mm:ss)</param>
+        /// <param name="timeTo">Time to (HH:mm:ss)</param>
+        public AllowedExecutionTimeRangeAttribute(string timeFrom, string timeTo)
+        {
+            _timeFrom = DateTime.ParseExact(timeFrom, "HH:mm:ss", CultureInfo.InvariantCulture).TimeOfDay;
+            _timeTo = DateTime.ParseExact(timeTo, "HH:mm:ss", CultureInfo.InvariantCulture).TimeOfDay;
+        }
 
-        var state = context.Connection.GetStateData(context.BackgroundJob.Id);
-        if (state == null) return; // just in case
+        public void OnStateElection(ElectStateContext context)
+        {
+            if (context.CurrentState != EnqueuedState.StateName) return;
 
-        var dateTimeNow = GetTimeInCentralEuropeStandardTime(DateTime.Now);
+            var state = context.Connection.GetStateData(context.BackgroundJob.Id);
+            if (state == null) return; // just in case
 
-        if (JobIsAllowedInActualTime(dateTimeNow) == false)
-        {
-            context.CandidateState = new FailedState(new ArgumentOutOfRangeException($"It is not allowed to perform the task at {dateTimeNow}"))
+            var dateTimeNow = GetTimeInCentralEuropeStandardTime(DateTime.Now);
+
+            if (JobIsAllowedInActualTime(dateTimeNow) == false)
             {
-                Reason = $"It is not allowed to perform the task at {dateTimeNow}"
-            };
+                context.CandidateState = new FailedState(new ArgumentOutOfRangeException($"It is not allowed to perform the task at {dateTimeNow}"))
+                {
+                    Reason = $"It is not allowed to perform the task at {dateTimeNow}"
+                };
+            }
         }
-    }
 
-    public bool JobIsAllowedInActualTime(TimeSpan now)
-    {
-        if (_timeFrom == _timeTo)
-            throw new Exception("Duration cannot be 0h0m0s");
-
-        // if range is over midnight (from: 23:00:00 to: 01:00:00 duration: 2h)
-        if (_timeFrom > _timeTo)
+        public bool JobIsAllowedInActualTime(TimeSpan now)
         {
-            if ((now >= _timeFrom) || (now <= _timeTo))
+            if (_timeFrom == _timeTo)
+                throw new Exception("Duration cannot be 0h0m0s");
+
+            // if range is over midnight (from: 23:00:00 to: 01:00:00 duration: 2h)
+            if (_timeFrom > _timeTo)
             {
-                return true;
+                if ((now >= _timeFrom) || (now <= _timeTo))
+                {
+                    return true;
+                }
             }
-        }
 
-        // if range is over day (from: 01:00:00 to: 23:00:00 duration: 22h)
-        if (_timeFrom < _timeTo)
-        {
-            if ((now >= _timeFrom) && (now <= _timeTo))
+            // if range is over day (from: 01:00:00 to: 23:00:00 duration: 22h)
+            if (_timeFrom < _timeTo)
             {
-                return true;
+                if ((now >= _timeFrom) && (now <= _timeTo))
+                {
+                    return true;
+                }
             }
-        }
 
-        return false;
-    }
+            return false;
+        }
 
-    public TimeSpan GetTimeInCentralEuropeStandardTime(DateTime dateTime)
-    {
-        TimeZoneInfo infotime = TimeZoneInfo.FindSystemTimeZoneById("Central Europe Standard Time");
+        public TimeSpan GetTimeInCentralEuropeStandardTime(DateTime dateTime)
+        {
+            TimeZoneInfo infotime = TimeZoneInfo.FindSystemTimeZoneById("Central Europe Standard Time");
 
-        return TimeZoneInfo.ConvertTimeBySystemTimeZoneId(dateTime, infotime.Id).TimeOfDay;
+            return TimeZoneInfo.ConvertTimeBySystemTimeZoneId(dateTime, infotime.Id).TimeOfDay;
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/src/Madev.Utils.Infrastructure.Hangfire/Attributes/DisableMultipleQueuedItemsFilterAttribute.cs b/src/Madev.Utils.Infrastructure.Hangfire/Attributes/DisableMultipleQueuedItemsFilterAttribute.cs
index 5489552..1039fca 100644
--- a/src/Madev.Utils.Infrastructure.Hangfire/Attributes/DisableMultipleQueuedItemsFilterAttribute.cs
+++ b/src/Madev.Utils.Infrastructure.Hangfire/Attributes/DisableMultipleQueuedItemsFilterAttribute.cs
@@ -1,40 +1,44 @@
 using Hangfire.Common;
 using Hangfire.States;
 using Hangfire.Storage;
+using System;
+using System.Linq;
 
-namespace Madev.Utils.Infrastructure.Hangfire.Attributes;
-public sealed class DisableMultipleQueuedItemsFilterAttribute : JobFilterAttribute, IElectStateFilter
+namespace Madev.Utils.Infrastructure.Hangfire.Attributes
 {
-    private readonly string _jobName;
-
-    public DisableMultipleQueuedItemsFilterAttribute(string jobName)
+    public sealed class DisableMultipleQueuedItemsFilterAttribute : JobFilterAttribute, IElectStateFilter
     {
-        _jobName = jobName;
-    }
+        private readonly string _jobName;
 
-    public void OnStateElection(ElectStateContext context)
-    {
-        var monitoring = context.Storage.GetMonitoringApi();
+        public DisableMultipleQueuedItemsFilterAttribute(string jobName)
+        {
+            _jobName = jobName;
+        }
 
-        if (ActiveProcess(monitoring) && !context.CandidateState.IsFinal && context.CandidateState.Name != FailedState.StateName && context.CurrentState != ScheduledState.StateName)
+        public void OnStateElection(ElectStateContext context)
         {
-            context.CandidateState = new DeletedState
+            var monitoring = context.Storage.GetMonitoringApi();
+
+            if (ActiveProcess(monitoring) && !context.CandidateState.IsFinal && context.CandidateState.Name != FailedState.StateName && context.CurrentState != ScheduledState.StateName)
             {
-                Reason = $"It is not allowed to perform multiple same tasks: {_jobName}"
-            };
+                context.CandidateState = new DeletedState
+                {
+                    Reason = $"It is not allowed to perform multiple same tasks: {_jobName}"
+                };
+            }
         }
-    }
 
-    private bool ActiveProcess(IMonitoringApi monitoring)
-    {
-        var processingJobs = monitoring.ProcessingJobs(0, 2000);
-        var scheduledJobs = monitoring.ScheduledJobs(0, 2000);
+        private bool ActiveProcess(IMonitoringApi monitoring)
+        {
+            var processingJobs = monitoring.ProcessingJobs(0, 2000);
+            var scheduledJobs = monitoring.ScheduledJobs(0, 2000);
 
-        var hasProcessingJob = processingJobs.Where(x =>
-            x.Value.Job.Type.Name.Equals(_jobName, StringComparison.InvariantCultureIgnoreCase));
-        var hasScheduledJob = scheduledJobs.Where(x =>
-            x.Value.Job.Type.Name.Equals(_jobName, StringComparison.InvariantCultureIgnoreCase));
+            var hasProcessingJob = processingJobs.Where(x =>
+                x.Value.Job.Type.Name.Equals(_jobName, StringComparison.InvariantCultureIgnoreCase));
+            var hasScheduledJob = scheduledJobs.Where(x =>
+                x.Value.Job.Type.Name.Equals(_jobName, StringComparison.InvariantCultureIgnoreCase));
 
-        return hasProcessingJob.Count() + hasScheduledJob.Count() > 0;
+            return hasProcessingJob.Count() + hasScheduledJob.Count() > 0;
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Madev.Utils.Infrastructure.Hangfire/Madev.Utils.Infrastructure.Hangfire.csproj b/src/Madev.Utils.Infrastructure.Hangfire/Madev.Utils.Infrastructure.Hangfire.csproj
index 135f57a..17629d7 100644
--- a/src/Madev.Utils.Infrastructure.Hangfire/Madev.Utils.Infrastructure.Hangfire.csproj
+++ b/src/Madev.Utils.Infrastructure.Hangfire/Madev.Utils.Infrastructure.Hangfire.csproj
@@ -1,13 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net10.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
+    <TargetFrameworks>netstandard2.1;net10.0</TargetFrameworks>
     <Nullable>enable</Nullable>
 
     <Authors>Miroslav Adamec</Authors>
     <Company>Madev</Company>
-    <Description>Hangfire background job scheduler etilities and extensions</Description>
+    <Description>Hangfire background job scheduler utilities and extensions</Description>
     <PackageProjectUrl>https://github.com/madev/Madev.Utils</PackageProjectUrl>
     <RepositoryUrl>https://github.com/madev/Madev.Utils</RepositoryUrl>
     <PackageTags>mirecad madev hangfire tools utils extensions</PackageTags>