diff --git a/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj b/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj
index 998e01f7..ed547915 100644
--- a/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj
+++ b/src/OpenIddict.AspNetCore/OpenIddict.AspNetCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
     <IncludeBuildOutput>false</IncludeBuildOutput>
     <IncludeSymbols>false</IncludeSymbols>
   </PropertyGroup>
@@ -21,7 +21,6 @@
 
   <ItemGroup>
     <None Include="_._" Pack="true" PackagePath="lib\net461\_._" />
-    <None Include="_._" Pack="true" PackagePath="lib\netcoreapp2.1\_._" />
     <None Include="_._" Pack="true" PackagePath="lib\netcoreapp3.1\_._" />
     <None Include="_._" Pack="true" PackagePath="lib\net5.0\_._" />
     <None Include="_._" Pack="true" PackagePath="lib\net6.0\_._" />
diff --git a/src/OpenIddict.Core/OpenIddict.Core.csproj b/src/OpenIddict.Core/OpenIddict.Core.csproj
index 928fe00a..0904133b 100644
--- a/src/OpenIddict.Core/OpenIddict.Core.csproj
+++ b/src/OpenIddict.Core/OpenIddict.Core.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;net472;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;net472;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict.EntityFrameworkCore/OpenIddict.EntityFrameworkCore.csproj b/src/OpenIddict.EntityFrameworkCore/OpenIddict.EntityFrameworkCore.csproj
index f3a529a8..10ca5fef 100644
--- a/src/OpenIddict.EntityFrameworkCore/OpenIddict.EntityFrameworkCore.csproj
+++ b/src/OpenIddict.EntityFrameworkCore/OpenIddict.EntityFrameworkCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict.MongoDb/OpenIddict.MongoDb.csproj b/src/OpenIddict.MongoDb/OpenIddict.MongoDb.csproj
index 561a3b33..d4bee3e0 100644
--- a/src/OpenIddict.MongoDb/OpenIddict.MongoDb.csproj
+++ b/src/OpenIddict.MongoDb/OpenIddict.MongoDb.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
     <SignAssembly>false</SignAssembly>
     <PublicSign>false</PublicSign>
   </PropertyGroup>
diff --git a/src/OpenIddict.Quartz/OpenIddict.Quartz.csproj b/src/OpenIddict.Quartz/OpenIddict.Quartz.csproj
index 2b939f32..8eb53b11 100644
--- a/src/OpenIddict.Quartz/OpenIddict.Quartz.csproj
+++ b/src/OpenIddict.Quartz/OpenIddict.Quartz.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict.Server.AspNetCore/OpenIddict.Server.AspNetCore.csproj b/src/OpenIddict.Server.AspNetCore/OpenIddict.Server.AspNetCore.csproj
index 1f2dea14..26369620 100644
--- a/src/OpenIddict.Server.AspNetCore/OpenIddict.Server.AspNetCore.csproj
+++ b/src/OpenIddict.Server.AspNetCore/OpenIddict.Server.AspNetCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict.Server.DataProtection/OpenIddict.Server.DataProtection.csproj b/src/OpenIddict.Server.DataProtection/OpenIddict.Server.DataProtection.csproj
index 0a974b15..496c54a6 100644
--- a/src/OpenIddict.Server.DataProtection/OpenIddict.Server.DataProtection.csproj
+++ b/src/OpenIddict.Server.DataProtection/OpenIddict.Server.DataProtection.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict.Server/OpenIddict.Server.csproj b/src/OpenIddict.Server/OpenIddict.Server.csproj
index e00a1eff..bd3f45d1 100644
--- a/src/OpenIddict.Server/OpenIddict.Server.csproj
+++ b/src/OpenIddict.Server/OpenIddict.Server.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;net472;net48;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;net472;net48;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict.Validation.AspNetCore/OpenIddict.Validation.AspNetCore.csproj b/src/OpenIddict.Validation.AspNetCore/OpenIddict.Validation.AspNetCore.csproj
index 94bb68df..d99c503e 100644
--- a/src/OpenIddict.Validation.AspNetCore/OpenIddict.Validation.AspNetCore.csproj
+++ b/src/OpenIddict.Validation.AspNetCore/OpenIddict.Validation.AspNetCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict.Validation/OpenIddict.Validation.csproj b/src/OpenIddict.Validation/OpenIddict.Validation.csproj
index b58d9352..934f7d66 100644
--- a/src/OpenIddict.Validation/OpenIddict.Validation.csproj
+++ b/src/OpenIddict.Validation/OpenIddict.Validation.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;net472;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;net472;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/src/OpenIddict/OpenIddict.csproj b/src/OpenIddict/OpenIddict.csproj
index 3db33e57..dcabf3b5 100644
--- a/src/OpenIddict/OpenIddict.csproj
+++ b/src/OpenIddict/OpenIddict.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0;netstandard2.0;netstandard2.1</TargetFrameworks>
     <IncludeBuildOutput>false</IncludeBuildOutput>
     <IncludeSymbols>false</IncludeSymbols>
   </PropertyGroup>
@@ -24,7 +24,6 @@ To use these features on ASP.NET Core or OWIN/Katana/ASP.NET 4.x, reference the
 
   <ItemGroup>
     <None Include="_._" Pack="true" PackagePath="lib\net461\_._" />
-    <None Include="_._" Pack="true" PackagePath="lib\netcoreapp2.1\_._" />
     <None Include="_._" Pack="true" PackagePath="lib\netcoreapp3.1\_._" />
     <None Include="_._" Pack="true" PackagePath="lib\net5.0\_._" />
     <None Include="_._" Pack="true" PackagePath="lib\net6.0\_._" />
diff --git a/test/OpenIddict.Abstractions.Tests/OpenIddict.Abstractions.Tests.csproj b/test/OpenIddict.Abstractions.Tests/OpenIddict.Abstractions.Tests.csproj
index 906cbdc9..1933f6c6 100644
--- a/test/OpenIddict.Abstractions.Tests/OpenIddict.Abstractions.Tests.csproj
+++ b/test/OpenIddict.Abstractions.Tests/OpenIddict.Abstractions.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/OpenIddict.Core.Tests/OpenIddict.Core.Tests.csproj b/test/OpenIddict.Core.Tests/OpenIddict.Core.Tests.csproj
index 98564292..aa98d4a8 100644
--- a/test/OpenIddict.Core.Tests/OpenIddict.Core.Tests.csproj
+++ b/test/OpenIddict.Core.Tests/OpenIddict.Core.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/OpenIddict.EntityFrameworkCore.Tests/OpenIddict.EntityFrameworkCore.Tests.csproj b/test/OpenIddict.EntityFrameworkCore.Tests/OpenIddict.EntityFrameworkCore.Tests.csproj
index 5a4a9d88..991acc6b 100644
--- a/test/OpenIddict.EntityFrameworkCore.Tests/OpenIddict.EntityFrameworkCore.Tests.csproj
+++ b/test/OpenIddict.EntityFrameworkCore.Tests/OpenIddict.EntityFrameworkCore.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/OpenIddict.MongoDb.Tests/OpenIddict.MongoDb.Tests.csproj b/test/OpenIddict.MongoDb.Tests/OpenIddict.MongoDb.Tests.csproj
index 29889e6e..42fff2e9 100644
--- a/test/OpenIddict.MongoDb.Tests/OpenIddict.MongoDb.Tests.csproj
+++ b/test/OpenIddict.MongoDb.Tests/OpenIddict.MongoDb.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
     <SignAssembly>false</SignAssembly>
     <PublicSign>false</PublicSign>
   </PropertyGroup>
diff --git a/test/OpenIddict.Quartz.Tests/OpenIddict.Quartz.Tests.csproj b/test/OpenIddict.Quartz.Tests/OpenIddict.Quartz.Tests.csproj
index c8bc45af..e06d93bd 100644
--- a/test/OpenIddict.Quartz.Tests/OpenIddict.Quartz.Tests.csproj
+++ b/test/OpenIddict.Quartz.Tests/OpenIddict.Quartz.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/OpenIddict.Server.AspNetCore.IntegrationTests/OpenIddict.Server.AspNetCore.IntegrationTests.csproj b/test/OpenIddict.Server.AspNetCore.IntegrationTests/OpenIddict.Server.AspNetCore.IntegrationTests.csproj
index 63443ddf..a3282875 100644
--- a/test/OpenIddict.Server.AspNetCore.IntegrationTests/OpenIddict.Server.AspNetCore.IntegrationTests.csproj
+++ b/test/OpenIddict.Server.AspNetCore.IntegrationTests/OpenIddict.Server.AspNetCore.IntegrationTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;net472;net48;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;net472;net48;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/OpenIddict.Server.IntegrationTests/OpenIddict.Server.IntegrationTests.csproj b/test/OpenIddict.Server.IntegrationTests/OpenIddict.Server.IntegrationTests.csproj
index 9d14e157..79f066f0 100644
--- a/test/OpenIddict.Server.IntegrationTests/OpenIddict.Server.IntegrationTests.csproj
+++ b/test/OpenIddict.Server.IntegrationTests/OpenIddict.Server.IntegrationTests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;net472;net48;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;net472;net48;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/OpenIddict.Server.Tests/OpenIddict.Server.Tests.csproj b/test/OpenIddict.Server.Tests/OpenIddict.Server.Tests.csproj
index 86d691ec..7e0b7f6c 100644
--- a/test/OpenIddict.Server.Tests/OpenIddict.Server.Tests.csproj
+++ b/test/OpenIddict.Server.Tests/OpenIddict.Server.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;net472;netcoreapp2.1;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net461;net472;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>