diff --git a/ManagedWimLib/ManagedWimLib.csproj b/ManagedWimLib/ManagedWimLib.csproj
index b87918e..13d8195 100644
--- a/ManagedWimLib/ManagedWimLib.csproj
+++ b/ManagedWimLib/ManagedWimLib.csproj
@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net451;netstandard2.0;netstandard2.1</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net451;netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks Condition="'$(OS)' != 'Windows_NT'">netstandard2.0;netcoreapp3.1</TargetFrameworks>
     <PackageId>ManagedWimLib</PackageId>
     <Title>ManagedWimLib</Title>
     <LangVersion>latest</LangVersion>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
-    <Version>2.3.1</Version>
+    <Version>2.4.0</Version>
     <Authors>Eric Biggers, Hajin Jang</Authors>
     <Company>Joveler</Company>
     <Description>Native wimlib wrapper library for .NET.
@@ -17,7 +17,8 @@ Supports Windows, Linux and macOS.</Description>
     <PackageProjectUrl>https://github.com/ied206/ManagedWimLib</PackageProjectUrl>
     <PackageIcon>images\Logo.png</PackageIcon>
     <RepositoryUrl>https://github.com/ied206/ManagedWimLib</RepositoryUrl>
-    <PackageReleaseNotes>- Official support for ARM64 macOS.</PackageReleaseNotes>
+    <PackageReleaseNotes>- Official support for ARM64 macOS.
+- Replace .NET Standard 2.1 target with .NET Core 3.1.</PackageReleaseNotes>
     <PackageTags>wim wimlib dism imagex archive native pinvoke interop</PackageTags>
   </PropertyGroup>
   <!-- PackageReference -->
@@ -36,8 +37,8 @@ Supports Windows, Linux and macOS.</Description>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
   </ItemGroup>
-  <!-- Native Library for .NET Standard 2.0 & 2.1 -->
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'netstandard2.1'">
+  <!-- Native Library for .NET Standard 2.0 & .NET Core 3.1 -->
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'netcoreapp3.1'">
     <None Include="runtimes\win-x86\native\*.dll">
       <Link>runtimes\win-x86\native\%(FileName)%(Extension)</Link> <!-- Project Reference -->
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
diff --git a/README.md b/README.md
index ed634af..4a49561 100644
--- a/README.md
+++ b/README.md
@@ -25,8 +25,8 @@ ManagedWimLib can be installed via [nuget](https://www.nuget.org/packages/Manage
 
 ### Targeted .NET platforms
 
-- .NET Standard 2.1 (.NET Core 3.0+)
-- .NET Standard 2.0 (.NET Framework 4.6.1+, .NET Core 2.0+)
+- .NET Core 3.1
+- .NET Standard 2.0
 - .NET Framework 4.5.1
 
 If you need .NET Standard 1.3 support, use [1.2.x version](https://www.nuget.org/packages/ManagedWimLib/1.2.4) instead.<br>
diff --git a/USAGE.md b/USAGE.md
index d81522e..b0b5b5f 100644
--- a/USAGE.md
+++ b/USAGE.md
@@ -36,11 +36,12 @@ public static void InitNativeLibrary()
 }
 ```
 
-#### For .NET Standard 2.0+:
+#### For .NET Standard 2.0+, NET Core 3.1+:
 
 ```cs
 public static void InitNativeLibrary()
 {
+    string libBaseDir = AppDomain.CurrentDomain.BaseDirectory;
     string libDir = "runtimes";
     if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
         libDir = Path.Combine(libDir, "win-");
@@ -66,13 +67,14 @@ public static void InitNativeLibrary()
     }
     libDir = Path.Combine(libDir, "native");
 
+    // macOS ARM64 requires native library path to be absolute path.
     string libPath = null;
     if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
-        libPath = Path.Combine(libDir, "libwim-15.dll");
+        libPath = Path.Combine(libBaseDir, libDir, "libwim-15.dll");
     else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-        libPath = Path.Combine(libDir, "libwim.so");
+        libPath = Path.Combine(libBaseDir, libDir, "libwim.so");
     else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-        libPath = Path.Combine(libDir, "libwim.dylib");
+        libPath = Path.Combine(libBaseDir, libDir, "libwim.dylib");
 
     if (libPath == null)
         throw new PlatformNotSupportedException($"Unable to find native library.");
@@ -100,7 +102,7 @@ ManagedWimLib comes with sets of binaries of `wimlib 1.13.4`. They will be copie
 
 - Create an empty file named `ManagedWimLib.Precompiled.Exclude` in the project directory to prevent a copy of the package-embedded binary.
 
-#### For .NET Standard 2.0+
+#### For .NET Standard 2.0, NET Core 3.1+
 
 | Platform             | Binary                                              | License              |
 |----------------------|-----------------------------------------------------|----------------------|