diff --git a/ArchUnitNET.NUnit/ArchUnitNET.NUnit.csproj b/ArchUnitNET.NUnit/ArchUnitNET.NUnit.csproj
index 0974cec14..38a6d698e 100644
--- a/ArchUnitNET.NUnit/ArchUnitNET.NUnit.csproj
+++ b/ArchUnitNET.NUnit/ArchUnitNET.NUnit.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>netstandard2.0;net40</TargetFrameworks>
+        <TargetFrameworks>netstandard2.0;net45</TargetFrameworks>
         <IsPackable>true</IsPackable>
         <Title>ArchUnit C# NUnit Extension</Title>
         <Authors>Florian Gather, Fritz Brandhuber</Authors>
diff --git a/ArchUnitNET/ArchUnitNET.csproj b/ArchUnitNET/ArchUnitNET.csproj
index 496d211f4..0917fdcbc 100644
--- a/ArchUnitNET/ArchUnitNET.csproj
+++ b/ArchUnitNET/ArchUnitNET.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     
     <PropertyGroup>
-        <TargetFrameworks>netstandard2.0;net40</TargetFrameworks>
+        <TargetFrameworks>netstandard2.0;net45</TargetFrameworks>
         <IsPackable>true</IsPackable>
         <RootNamespace>ArchUnitNET</RootNamespace>
         <PackageId>TngTech.ArchUnitNET</PackageId>