diff --git a/Gotrue/Gotrue.csproj b/Gotrue/Gotrue.csproj
index 8235777..b33c242 100644
--- a/Gotrue/Gotrue.csproj
+++ b/Gotrue/Gotrue.csproj
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
-        <TargetFramework>netstandard2.0</TargetFramework>
+        <TargetFramework>netstandard2.1</TargetFramework>
         <PackOnBuild>true</PackOnBuild>
         <PackageId>Supabase.Gotrue</PackageId>
         <RootNamespace>Supabase.Gotrue</RootNamespace>
diff --git a/Gotrue/Helpers.cs b/Gotrue/Helpers.cs
index 646e438..bcee01b 100644
--- a/Gotrue/Helpers.cs
+++ b/Gotrue/Helpers.cs
@@ -29,11 +29,10 @@ public static string GenerateNonce()
 		{
 			// ReSharper disable once StringLiteralTypo
 			const string chars = "abcdefghijklmnopqrstuvwxyz123456789";
-			var random = new Random();
 			var nonce = new char[128];
 			for (var i = 0; i < nonce.Length; i++)
 			{
-				nonce[i] = chars[random.Next(chars.Length)];
+				nonce[i] = chars[RandomNumberGenerator.GetInt32(0, chars.Length)];
 			}
 
 			return new string(nonce);