diff --git a/.paket/Paket.Restore.targets b/.paket/Paket.Restore.targets
index c451c7d2..71a8322b 100644
--- a/.paket/Paket.Restore.targets
+++ b/.paket/Paket.Restore.targets
@@ -43,13 +43,13 @@
     <!-- Step 1 Check if lockfile is properly restored -->
     <PropertyGroup>
       <PaketRestoreRequired>true</PaketRestoreRequired>
-      <NoWarn>$(NoWarn);NU1603</NoWarn>
+      <NoWarn>$(NoWarn);NU1603;NU1604;NU1605;NU1608</NoWarn>
     </PropertyGroup>
 
     <!-- Because ReadAllText is slow on osx/linux, try to find shasum and awk -->
     <PropertyGroup>
-      <PaketRestoreCachedHasher Condition="'$(OS)' != 'Windows_NT' And '$(PaketRestoreCachedHasher)' == '' And Exists('/usr/bin/shasum') And Exists('/usr/bin/awk')">/usr/bin/shasum $(PaketRestoreCacheFile) | /usr/bin/awk '{ print $1 }'</PaketRestoreCachedHasher>
-      <PaketRestoreLockFileHasher Condition="'$(OS)' != 'Windows_NT' And '$(PaketRestoreLockFileHash)' == '' And Exists('/usr/bin/shasum') And Exists('/usr/bin/awk')">/usr/bin/shasum $(PaketLockFilePath) | /usr/bin/awk '{ print $1 }'</PaketRestoreLockFileHasher>
+      <PaketRestoreCachedHasher Condition="'$(OS)' != 'Windows_NT' And '$(PaketRestoreCachedHasher)' == '' And Exists('/usr/bin/shasum') And Exists('/usr/bin/awk')">/usr/bin/shasum "$(PaketRestoreCacheFile)" | /usr/bin/awk '{ print $1 }'</PaketRestoreCachedHasher>
+      <PaketRestoreLockFileHasher Condition="'$(OS)' != 'Windows_NT' And '$(PaketRestoreLockFileHash)' == '' And Exists('/usr/bin/shasum') And Exists('/usr/bin/awk')">/usr/bin/shasum "$(PaketLockFilePath)" | /usr/bin/awk '{ print $1 }'</PaketRestoreLockFileHasher>
     </PropertyGroup>
 
     <!-- If shasum and awk exist get the hashes -->
@@ -60,6 +60,9 @@
       <Output TaskParameter="ConsoleOutput" PropertyName="PaketRestoreLockFileHash" />
     </Exec>
 
+    <!-- Debug whats going on -->
+    <Message Importance="low" Text="calling paket restore with targetframework=$(TargetFramework) targetframeworks=$(TargetFrameworks)" />
+
     <PropertyGroup Condition="Exists('$(PaketRestoreCacheFile)') ">
       <!-- if no hash has been done yet fall back to just reading in the files and comparing them -->
       <PaketRestoreCachedHash Condition=" '$(PaketRestoreCachedHash)' == '' ">$([System.IO.File]::ReadAllText('$(PaketRestoreCacheFile)'))</PaketRestoreCachedHash>
@@ -69,11 +72,19 @@
       <PaketRestoreRequired Condition=" '$(PaketRestoreLockFileHash)' == '' ">true</PaketRestoreRequired>
     </PropertyGroup>
 
+
     <!-- Do a global restore if required -->
     <Exec Command='$(PaketBootStrapperCommand)' Condition="Exists('$(PaketBootStrapperExePath)') AND !(Exists('$(PaketExePath)'))" ContinueOnError="false" />
     <Exec Command='$(PaketCommand) restore' Condition=" '$(PaketRestoreRequired)' == 'true' " ContinueOnError="false" />
 
     <!-- Step 2 Detect project specific changes -->
+    <ItemGroup>
+      <MyTargetFrameworks Condition="'$(TargetFramework)' != '' " Include="$(TargetFramework)"></MyTargetFrameworks>
+      <!-- Don't include all frameworks when msbuild explicitly asks for a single one -->
+      <MyTargetFrameworks Condition="'$(TargetFrameworks)' != '' AND '$(TargetFramework)' == '' " Include="$(TargetFrameworks)"></MyTargetFrameworks>
+      <PaketResolvedFilePaths Include="@(MyTargetFrameworks -> '$(MSBuildProjectDirectory)\obj\$(MSBuildProjectFile).%(Identity).paket.resolved')"></PaketResolvedFilePaths>
+    </ItemGroup>
+    <Message Importance="low" Text="MyTargetFrameworks=@(MyTargetFrameworks) PaketResolvedFilePaths=@(PaketResolvedFilePaths)" />
     <PropertyGroup>
       <PaketReferencesCachedFilePath>$(MSBuildProjectDirectory)\obj\$(MSBuildProjectFile).paket.references.cached</PaketReferencesCachedFilePath>
       <!-- MyProject.fsproj.paket.references has the highest precedence -->
@@ -82,7 +93,9 @@
       <PaketOriginalReferencesFilePath Condition=" !Exists('$(PaketOriginalReferencesFilePath)')">$(MSBuildProjectDirectory)\$(MSBuildProjectName).paket.references</PaketOriginalReferencesFilePath>
       <!-- paket.references -->
       <PaketOriginalReferencesFilePath Condition=" !Exists('$(PaketOriginalReferencesFilePath)')">$(MSBuildProjectDirectory)\paket.references</PaketOriginalReferencesFilePath>
-      <PaketResolvedFilePath>$(MSBuildProjectDirectory)\obj\$(MSBuildProjectFile).$(TargetFramework).paket.resolved</PaketResolvedFilePath>
+      
+      <DoAllResolvedFilesExist>false</DoAllResolvedFilesExist>
+      <DoAllResolvedFilesExist Condition="Exists(%(PaketResolvedFilePaths.Identity))">true</DoAllResolvedFilesExist>
       <PaketRestoreRequired>true</PaketRestoreRequired>
       <PaketRestoreRequiredReason>references-file-or-cache-not-found</PaketRestoreRequiredReason>
     </PropertyGroup>
@@ -101,24 +114,29 @@
     </PropertyGroup>
 
     <!-- Step 2 b detect relevant changes in project file (new targetframework) -->
-    <PropertyGroup Condition=" !Exists('$(PaketResolvedFilePath)') AND '$(TargetFramework)' != '' ">
+    <PropertyGroup Condition=" '$(DoAllResolvedFilesExist)' != 'true' ">
       <PaketRestoreRequired>true</PaketRestoreRequired>
-      <PaketRestoreRequiredReason>target-framework '$(TargetFramework)'</PaketRestoreRequiredReason>
+      <PaketRestoreRequiredReason>target-framework '$(TargetFramework)' or '$(TargetFrameworks)' files @(PaketResolvedFilePaths)</PaketRestoreRequiredReason>
     </PropertyGroup>
 
     <!-- Step 3 Restore project specific stuff if required -->
     <Message Condition=" '$(PaketRestoreRequired)' == 'true' " Importance="low" Text="Detected a change ('$(PaketRestoreRequiredReason)') in the project file '$(MSBuildProjectFullPath)', calling paket restore" />
-    <Exec Command='$(PaketCommand) restore --project "$(MSBuildProjectFullPath)"' Condition=" '$(PaketRestoreRequired)' == 'true' " ContinueOnError="false" />
+    <Exec Command='$(PaketCommand) restore --project "$(MSBuildProjectFullPath)" --target-framework "$(TargetFrameworks)"' Condition=" '$(PaketRestoreRequired)' == 'true' AND '$(TargetFramework)' == '' " ContinueOnError="false" />
+    <Exec Command='$(PaketCommand) restore --project "$(MSBuildProjectFullPath)" --target-framework "$(TargetFramework)"' Condition=" '$(PaketRestoreRequired)' == 'true' AND '$(TargetFramework)' != '' " ContinueOnError="false" />
 
     <!-- This shouldn't actually happen, but just to be sure. -->
-    <Error Condition=" !Exists('$(PaketResolvedFilePath)') AND '$(TargetFramework)' != '' AND '$(ResolveNuGetPackages)' != 'False' " Text="Paket file '$(PaketResolvedFilePath)' is missing while restoring $(MSBuildProjectFile). Please delete 'paket-files/paket.restore.cached' and call 'paket restore'." />
+    <PropertyGroup>
+      <DoAllResolvedFilesExist>false</DoAllResolvedFilesExist>
+      <DoAllResolvedFilesExist Condition="Exists(%(PaketResolvedFilePaths.Identity))">true</DoAllResolvedFilesExist>
+    </PropertyGroup>
+    <Error Condition=" '$(DoAllResolvedFilesExist)' != 'true' AND '$(ResolveNuGetPackages)' != 'False' " Text="One Paket file '@(PaketResolvedFilePaths)' is missing while restoring $(MSBuildProjectFile). Please delete 'paket-files/paket.restore.cached' and call 'paket restore'." />
 
     <!-- Step 4 forward all msbuild properties (PackageReference, DotNetCliToolReference) to msbuild -->
-    <ReadLinesFromFile Condition="Exists('$(PaketResolvedFilePath)')" File="$(PaketResolvedFilePath)" >
+    <ReadLinesFromFile Condition="'@(PaketResolvedFilePaths)' != ''" File="%(PaketResolvedFilePaths.Identity)" ><!--Condition="Exists('%(PaketResolvedFilePaths.Identity)')"-->
       <Output TaskParameter="Lines" ItemName="PaketReferencesFileLines"/>
     </ReadLinesFromFile>
 
-    <ItemGroup Condition=" Exists('$(PaketResolvedFilePath)') AND '@(PaketReferencesFileLines)' != '' " >
+    <ItemGroup Condition=" '@(PaketReferencesFileLines)' != '' " >
       <PaketReferencesFileLinesInfo Include="@(PaketReferencesFileLines)" >
         <PackageName>$([System.String]::Copy('%(PaketReferencesFileLines.Identity)').Split(',')[0])</PackageName>
         <PackageVersion>$([System.String]::Copy('%(PaketReferencesFileLines.Identity)').Split(',')[1])</PackageVersion>
@@ -126,8 +144,9 @@
       </PaketReferencesFileLinesInfo>
       <PackageReference Include="%(PaketReferencesFileLinesInfo.PackageName)">
         <Version>%(PaketReferencesFileLinesInfo.PackageVersion)</Version>
-        <PrivateAssets Condition="%(PaketReferencesFileLinesInfo.AllPrivateAssets) == 'true'">All</PrivateAssets>
+        <PrivateAssets Condition=" ('%(PaketReferencesFileLinesInfo.AllPrivateAssets)' == 'true') Or ('$(PackAsTool)' == 'true') ">All</PrivateAssets>
         <ExcludeAssets Condition="%(PaketReferencesFileLinesInfo.AllPrivateAssets) == 'exclude'">runtime</ExcludeAssets>
+        <Publish Condition=" '$(PackAsTool)' == 'true' ">true</Publish>
       </PackageReference>
     </ItemGroup>
 
diff --git a/src/Fable.React/Fable.Helpers.React.fs b/src/Fable.React/Fable.Helpers.React.fs
index 703a9d53..80c8c934 100644
--- a/src/Fable.React/Fable.Helpers.React.fs
+++ b/src/Fable.React/Fable.Helpers.React.fs
@@ -158,12 +158,8 @@ module rec Props =
         | Y1 of obj
         | Y2 of obj
         | Y of obj
-#if !FABLE_COMPILER
-        | Custom of string * obj
-#else
         /// If you are searching for a way to provide a value not supported by this DSL then use something like: CSSProp.Custom ("align-content", "center")
-        static member inline Custom (key: string, value: obj) : SVGAttr = !!(key, value)
-#endif
+        | [<Erase>] Custom of string * obj
         interface IProp
 
     type HTMLAttr =
@@ -312,12 +308,10 @@ module rec Props =
         | Results of float
         | Security of string
         | Unselectable of bool
+        | [<Erase>] Custom of string * obj
 #if !FABLE_COMPILER
-        | Custom of string * obj
         | Style of CSSProp list
         | Data of string * obj
-#else
-        static member inline Custom (key: string, value: obj) : HTMLAttr = !!(key, value)
 #endif
         interface IHTMLProp
 
@@ -727,12 +721,8 @@ module rec Props =
         | WritingMode of obj
         | ZIndex of obj
         | Zoom of obj
-#if !FABLE_COMPILER
-        | Custom of string * obj
-#else
         /// If you are searching for a way to provide a value not supported by this DSL then use something like: CSSProp.Custom ("align-content", "center")
-        static member inline Custom (key: string, value: obj) : CSSProp = !!(key, value)
-#endif
+        | [<Erase>] Custom of string * obj
 
 #if FABLE_COMPILER
     let inline Style (css: CSSProp list): HTMLAttr =
diff --git a/src/Fable.React/Fable.React.fsproj b/src/Fable.React/Fable.React.fsproj
index 80b48171..17328188 100644
--- a/src/Fable.React/Fable.React.fsproj
+++ b/src/Fable.React/Fable.React.fsproj
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <Version>3.1.2</Version>
+    <Version>3.1.3</Version>
     <TargetFrameworks>netstandard1.6;netstandard2.0</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
diff --git a/src/Fable.React/RELEASE_NOTES.md b/src/Fable.React/RELEASE_NOTES.md
index 0bc75069..d76f7945 100644
--- a/src/Fable.React/RELEASE_NOTES.md
+++ b/src/Fable.React/RELEASE_NOTES.md
@@ -1,3 +1,7 @@
+### 3.1.3
+
+* Make `Custom` another DU case instead of static member (see #89)
+
 ### 3.1.2
 
 * Include documentation in the package