diff --git a/images/ubuntu/toolsets/toolset-2004.json b/images/ubuntu/toolsets/toolset-2004.json
index ec548032..b3662e70 100644
--- a/images/ubuntu/toolsets/toolset-2004.json
+++ b/images/ubuntu/toolsets/toolset-2004.json
@@ -269,11 +269,13 @@
     "dotnet": {
         "aptPackages": [
             "dotnet-sdk-6.0",
-            "dotnet-sdk-8.0"
+            "dotnet-sdk-8.0",
+            "dotnet-sdk-9.0"
         ],
         "versions": [
             "6.0",
-            "8.0"
+            "8.0",
+            "9.0"
         ],
         "tools": [
             { "name": "nbgv", "test": "nbgv --version", "getversion" : "nbgv --version" }
diff --git a/images/ubuntu/toolsets/toolset-2204.json b/images/ubuntu/toolsets/toolset-2204.json
index 6a562449..4e6e4dea 100644
--- a/images/ubuntu/toolsets/toolset-2204.json
+++ b/images/ubuntu/toolsets/toolset-2204.json
@@ -268,11 +268,13 @@
     "dotnet": {
         "aptPackages": [
             "dotnet-sdk-6.0",
-            "dotnet-sdk-8.0"
+            "dotnet-sdk-8.0",
+            "dotnet-sdk-9.0"
         ],
         "versions": [
             "6.0",
-            "8.0"
+            "8.0",
+            "9.0"
         ],
         "tools": [
             { "name": "nbgv", "test": "nbgv --version", "getversion" : "nbgv --version" }