diff --git a/MatrixExtensions.cs b/MatrixExtensions.cs
index 947f667..e67df88 100644
--- a/MatrixExtensions.cs
+++ b/MatrixExtensions.cs
@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
-using System.Threading.Tasks;
 
 using SMath.Manager;
 using SMath.Math;
diff --git a/MatrixExtensions.csproj b/MatrixExtensions.csproj
index 6314da9..594834d 100644
--- a/MatrixExtensions.csproj
+++ b/MatrixExtensions.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>MatrixExtensions</RootNamespace>
     <AssemblyName>MatrixExtensions</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AssemblyVersion>1.0.*</AssemblyVersion>
     <Deterministic>false</Deterministic>
diff --git a/MatrixL.cs b/MatrixL.cs
index b4437e1..e2daaee 100644
--- a/MatrixL.cs
+++ b/MatrixL.cs
@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
-using System.Threading.Tasks;
 
 namespace MatrixExtensions
 {
diff --git a/Properties/AssemblyInfo.cs b/Properties/AssemblyInfo.cs
index d732a00..bc80949 100644
--- a/Properties/AssemblyInfo.cs
+++ b/Properties/AssemblyInfo.cs
@@ -8,7 +8,7 @@ using System.Runtime.InteropServices;
 [assembly: AssemblyTitle("MatrixExtensions")]
 [assembly: AssemblyDescription("Сustom functions for working with matrices")]
 [assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("Aleksandr Ponomarev")]
+[assembly: AssemblyCompany("Aleksandr Ponomarev(https://t.me/smathru)")]
 [assembly: AssemblyProduct("MatrixExtensions")]
 [assembly: AssemblyCopyright("Copyright ©  2020 SMathStudio")]
 [assembly: AssemblyTrademark("")]