diff --git a/Casbin.Persist.Adapter.EFCore/Casbin.Persist.Adapter.EFCore.csproj b/Casbin.Persist.Adapter.EFCore/Casbin.Persist.Adapter.EFCore.csproj
index 0a784f7..b0d5bcd 100644
--- a/Casbin.Persist.Adapter.EFCore/Casbin.Persist.Adapter.EFCore.csproj
+++ b/Casbin.Persist.Adapter.EFCore/Casbin.Persist.Adapter.EFCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net7.0;net6.0;net5.0;netcoreapp3.1;netstandard2.1;netstandard2.0;</TargetFrameworks>
+    <TargetFrameworks>net8.0;net7.0;net6.0;net5.0;netcoreapp3.1;</TargetFrameworks>
     <LangVersion>9.0</LangVersion>
   </PropertyGroup>
 
@@ -17,7 +17,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Casbin.NET" Version="2.0.1" />
+    <PackageReference Include="Casbin.NET" Version="2.5.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
@@ -45,16 +45,6 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="3.1.32" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.1'">
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.32" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="3.1.32" />
-  </ItemGroup>
-
-  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.32" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="3.1.32" />
-  </ItemGroup>
-
   <ItemGroup>
     <None Include="casbin.png" Pack="true" Visible="false" PackagePath="" />
   </ItemGroup>