diff --git a/by-language/csharp-npgsql/demo.csproj b/by-language/csharp-npgsql/demo.csproj
index 69bc8003..cfdedc02 100644
--- a/by-language/csharp-npgsql/demo.csproj
+++ b/by-language/csharp-npgsql/demo.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>netcoreapp3.1;net461;net5.0;net6.0;net7.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;net48;net5.0;net6.0;net7.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateProgramFile>false</GenerateProgramFile>