diff --git a/.github/workflows/publish_ci.yml b/.github/workflows/publish_ci.yml
index eced3c03..ef679a58 100644
--- a/.github/workflows/publish_ci.yml
+++ b/.github/workflows/publish_ci.yml
@@ -12,7 +12,7 @@ env:
 jobs:
   publish:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - name: Checkout
@@ -32,7 +32,7 @@ jobs:
 
     - name: Add version to global.json
       run: |
-        $version = "8.0.403"
+        $version = "9.0.200"
         $globalJsonPath = "global.json"
         $globalJson = Get-Content -Raw -Path $globalJsonPath | ConvertFrom-Json
         if ($null -eq $globalJson.sdk.version) {
@@ -46,7 +46,7 @@ jobs:
     - name: Install .NET Core
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.0.403
+        dotnet-version: 9.0.200
 
     - name: Add the GitHub source
       run: dotnet nuget add source --username USERNAME --password ${{secrets.GITHUB_TOKEN}} --store-password-in-clear-text --name "github.com" "https://nuget.pkg.github.com/fsprojects/index.json"
diff --git a/.github/workflows/publish_release.yml b/.github/workflows/publish_release.yml
index ed717e28..4b42d09d 100644
--- a/.github/workflows/publish_release.yml
+++ b/.github/workflows/publish_release.yml
@@ -12,7 +12,7 @@ env:
 
 jobs:
   publish:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - name: Checkout
@@ -34,7 +34,7 @@ jobs:
 
     - name: Add version to global.json
       run: |
-        $version = "8.0.403"
+        $version = "9.0.200"
         $globalJsonPath = "global.json"
         $globalJson = Get-Content -Raw -Path $globalJsonPath | ConvertFrom-Json
         if ($null -eq $globalJson.sdk.version) {
@@ -48,7 +48,7 @@ jobs:
     - name: Install .NET Core
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 8.0.403
+        dotnet-version: 9.0.200
 
     - name: Install local tools
       run: dotnet tool restore
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 179bdff0..6d88fe46 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -20,8 +20,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
-        dotnet: [8.0.403]
+        os: [ubuntu-22.04, windows-latest, macOS-latest]
+        dotnet: [9.0.200]
     runs-on: ${{ matrix.os }}
 
     steps:
diff --git a/build/Program.fs b/build/Program.fs
index 2a861417..8bc4aed5 100644
--- a/build/Program.fs
+++ b/build/Program.fs
@@ -32,7 +32,7 @@ let ctx = Context.forceFakeContext ()
 let embedAll = ctx.Arguments |> List.exists (fun arg -> arg = BuildArguments.EmbedAll)
 
 module DotNetCli =
-    let setVersion (o : DotNet.Options) = { o with Version = Some "8.0.403" }
+    let setVersion (o : DotNet.Options) = { o with Version = Some "9.0.200" }
     let setRestoreOptions (o : DotNet.RestoreOptions) = o.WithCommon setVersion
 
 let configurationString = Environment.environVarOrDefault "CONFIGURATION" "Release"