diff --git a/common b/common
index 6a6f177ed7..28ed2fe13f 160000
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit 6a6f177ed77bc2b89912d40a43949f4dddef5d03
+Subproject commit 28ed2fe13fab4e341e458150d9b10f74d95550d9
diff --git a/src/Hl7.Fhir.Core/Hl7.Fhir.Core.csproj b/src/Hl7.Fhir.Core/Hl7.Fhir.Core.csproj
index e266b7590a..ea2719b114 100644
--- a/src/Hl7.Fhir.Core/Hl7.Fhir.Core.csproj
+++ b/src/Hl7.Fhir.Core/Hl7.Fhir.Core.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
 	<PropertyGroup>
-		<TargetFrameworks>net5.0;net45;netstandard1.6;netstandard2.0</TargetFrameworks>
+		<TargetFrameworks>net5.0;net452;netstandard1.6;netstandard2.0</TargetFrameworks>
 	</PropertyGroup>
 
 	<Import Project="..\firely-net-sdk.props" />
@@ -18,16 +18,13 @@
 		<RootNamespace>Hl7.Fhir</RootNamespace>
 	</PropertyGroup>
 
-	<ItemGroup Condition=" '$(TargetFramework)' != 'net45'">
+	<ItemGroup Condition=" '$(TargetFramework)' != 'net452'">
 		<PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
 	</ItemGroup>
 
-	<ItemGroup Condition=" '$(TargetFramework)' == 'net45'">
+	<ItemGroup Condition=" '$(TargetFramework)' == 'net452'">
 		<Reference Include="System.ComponentModel.DataAnnotations" />
-	</ItemGroup>
-
-	<ItemGroup Condition="'$(TargetFramework)' == 'net45'">
-		<Reference Include="System.Net.Http"/>
+    <Reference Include="System.Net.Http"/>
 	</ItemGroup>
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.6'">
diff --git a/src/Hl7.Fhir.Specification/Hl7.Fhir.Specification.csproj b/src/Hl7.Fhir.Specification/Hl7.Fhir.Specification.csproj
index 04162b3e10..3f14aca9fc 100644
--- a/src/Hl7.Fhir.Specification/Hl7.Fhir.Specification.csproj
+++ b/src/Hl7.Fhir.Specification/Hl7.Fhir.Specification.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
 	<PropertyGroup>
-		<TargetFrameworks>net5.0;net45;netstandard2.0</TargetFrameworks>
+		<TargetFrameworks>net5.0;net452;netstandard2.0</TargetFrameworks>
 	</PropertyGroup>
 
 	<Import Project="..\firely-net-sdk.props" />
@@ -24,7 +24,7 @@
 		<ProjectReference Include="..\..\common\src\Hl7.FhirPath\Hl7.FhirPath.csproj" />
 	</ItemGroup>
 
-	<ItemGroup Condition="'$(TargetFramework)' == 'net45'">
+	<ItemGroup Condition="'$(TargetFramework)' == 'net452'">
 		<Reference Include="System.Net.Http"/>
 	</ItemGroup>