diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7ce045fd..eb5bcb58 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -49,13 +49,17 @@ jobs:
         run: git fetch --prune --unshallow
       - uses: actions/setup-dotnet@3e891b0cb619bf60e2c25674b222b8940e2c1c25 # v4.1.0
         with:
+          # codecov needs 2.1
+          # unittests needs 3.1
+          # gitversion needs 5.0
+          # cake 1.3 needs 6.0
+          # .NET 9 to build
           dotnet-version: |
-            2.1.818
-            3.1.x
-            5.0.x
-            6.0.x
-            7.0.x
-            8.0.x
+            2.1
+            3.1
+            5.0
+            6.0
+            9.0
       - name: Cache Tools
         uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4
         with:
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 7dc7a2e4..333872aa 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -36,9 +36,13 @@ jobs:
         fetch-depth: 0
     - uses: actions/setup-dotnet@3e891b0cb619bf60e2c25674b222b8940e2c1c25 # v4.1.0
       with:
+        # gitversion needs 5.0
+        # cake 1.3 needs 6.0
+        # .NET 9 to build
         dotnet-version: |
-            5.0.x
-            8.0.x
+          5.0
+          6.0
+          9.0
 
     - name: Cache Tools
       uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4
diff --git a/global.json b/global.json
index dd909f70..ccd7812e 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
     "sdk": {
-      "version": "8.0.403",
+      "version": "9.0.100",
       "rollForward": "latestFeature"
     }
   }