diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
index 1bee19e..7ade7dd 100644
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "cake.tool": {
-      "version": "1.3.0",
+      "version": "2.0.0",
       "commands": [
         "dotnet-cake"
       ]
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3366e96..be28b9c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,26 +26,21 @@ jobs:
       fail-fast: false
       matrix:
         job:
-          - os: ubuntu-18.04
-            build: ./build.sh
-          - os: ubuntu-20.04
-            build: ./build.sh
           - os: windows-2019
             build: ./build.cmd
             push: true
           - os: windows-2022
             build: ./build.cmd
-          - os: macos-10.15
-            build: ./build.sh
-          - os: macos-11
-            build: ./build.sh
     name: ${{ matrix.job.os }}
     runs-on: ${{ matrix.job.os }}
     steps:
-      - name: Setup net5.0
+      - name: Install .NET SDKs
         uses: actions/setup-dotnet@v1.9.0
         with:
-          dotnet-version: "5.0.401"
+          dotnet-version: |
+            3.1.415
+            5.0.403
+            6.0.100
       - name: Run dotnet --info
         run: dotnet --info
       - uses: actions/checkout@v2.4.0
diff --git a/build.cake b/build.cake
index 6fae4aa..a7501fc 100644
--- a/build.cake
+++ b/build.cake
@@ -1,9 +1,9 @@
 #tool "nuget:?package=NuGet.CommandLine&version=6.0.0"
 #tool "nuget:?package=7-Zip.CommandLine&version=18.1.0"
 
-#addin "nuget:?package=Cake.MinVer&version=1.0.1"
-#addin "nuget:?package=Cake.Args&version=1.0.1"
-#addin "nuget:?package=Cake.7zip&version=1.0.4"
+#addin "nuget:?package=Cake.MinVer&version=2.0.0"
+#addin "nuget:?package=Cake.Args&version=2.0.0"
+#addin "nuget:?package=Cake.7zip&version=2.0.0"
 
 var target       = ArgumentOrDefault<string>("target") ?? "publish";
 var buildVersion = MinVer(s => s.WithTagPrefix("v").WithDefaultPreReleasePhase("preview"));
@@ -19,9 +19,11 @@ Task("restore")
     .IsDependentOn("clean")
     .Does(() =>
 {
-    DotNetCoreRestore("./exceldna-unpack.sln", new DotNetCoreRestoreSettings
+    NuGetRestore("./src/ExcelDnaUnpack/ExcelDnaUnpack.csproj", new NuGetRestoreSettings
     {
-        LockedMode = true,
+        NoCache = true,
+        NonInteractive = true,
+        PackagesDirectory = MakeAbsolute(new DirectoryPath("./packages")),
     });
 
     NuGetRestore("./test/ExcelDnaUnpack.Tests.ExcelAddIn/ExcelDnaUnpack.Tests.ExcelAddIn.csproj", new NuGetRestoreSettings
@@ -38,7 +40,6 @@ Task("build")
 {
     MSBuild("./exceldna-unpack.sln", settings => settings
         .SetConfiguration(configuration)
-        .UseToolVersion(MSBuildToolVersion.VS2019)
         .WithTarget("Rebuild")
         .SetVersion(buildVersion.Version)
         .SetFileVersion(buildVersion.FileVersion)