diff --git a/src/dotnet-mssql/README.md b/src/dotnet-mssql/README.md
index 6fd6e79..79248b4 100644
--- a/src/dotnet-mssql/README.md
+++ b/src/dotnet-mssql/README.md
@@ -7,7 +7,7 @@ Develop C# and .NET Core based applications. Includes all needed SDKs, extension
 
 | Options Id | Description | Type | Default Value |
 |-----|-----|-----|-----|
-| imageVariant | .NET version: | string | 8.0-bookworm |
+| imageVariant | .NET version: | string | 9.0-bookworm |
 
 This template references an image that was [pre-built](https://containers.dev/implementors/reference/#prebuilding) to automatically include needed devcontainer.json metadata.
 
diff --git a/src/dotnet-mssql/devcontainer-template.json b/src/dotnet-mssql/devcontainer-template.json
index 49f901f..fb98760 100644
--- a/src/dotnet-mssql/devcontainer-template.json
+++ b/src/dotnet-mssql/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "dotnet-mssql",
-    "version": "3.3.2",
+    "version": "3.4.0",
     "name": "C# (.NET) and MS SQL",
     "description": "Develop C# and .NET Core based applications. Includes all needed SDKs, extensions, dependencies and an MS SQL container for parallel database development. Adds an additional MS SQL container to the C# (.NET Core) container definition and deploys any .dacpac files from the mssql .devcontainer folder.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/dotnet-mssql",
@@ -11,17 +11,20 @@
             "type": "string",
             "description": ".NET version:",
             "proposals": [
+				"9.0",
                 "8.0",
                 "6.0",
+				"9.0-bookworm",
                 "8.0-bookworm",
                 "6.0-bookworm",
                 "6.0-bullseye",
                 "8.0-noble",
+				"9.0-jammy",
                 "8.0-jammy",
                 "6.0-jammy",
                 "6.0-focal"
             ],
-            "default": "8.0-bookworm"
+            "default": "9.0-bookworm"
         }
     },
     "platforms": [
diff --git a/src/dotnet-postgres/README.md b/src/dotnet-postgres/README.md
index e9c52dc..5691276 100644
--- a/src/dotnet-postgres/README.md
+++ b/src/dotnet-postgres/README.md
@@ -7,7 +7,7 @@ Develop C# and .NET Core based applications. Includes all needed SDKs, extension
 
 | Options Id | Description | Type | Default Value |
 |-----|-----|-----|-----|
-| imageVariant | .NET version: | string | 8.0-bookworm |
+| imageVariant | .NET version: | string | 9.0-bookworm |
 
 This template references an image that was [pre-built](https://containers.dev/implementors/reference/#prebuilding) to automatically include needed devcontainer.json metadata.
 
diff --git a/src/dotnet-postgres/devcontainer-template.json b/src/dotnet-postgres/devcontainer-template.json
index 4a63207..64f6562 100644
--- a/src/dotnet-postgres/devcontainer-template.json
+++ b/src/dotnet-postgres/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "dotnet-postgres",
-    "version": "3.2.2",
+    "version": "3.3.0",
     "name": "C# (.NET) and PostgreSQL",
     "description": "Develop C# and .NET Core based applications. Includes all needed SDKs, extensions, dependencies and a PostgreSQL container for parallel database development. Adds an additional PostgreSQL container to the C# (.NET Core) container definition.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/dotnet-postgres",
@@ -11,17 +11,20 @@
             "type": "string",
             "description": ".NET version:",
             "proposals": [
+				"9.0",
                 "8.0",
                 "6.0",
+				"9.0-bookworm",
                 "8.0-bookworm",
                 "6.0-bookworm",
                 "6.0-bullseye",
                 "8.0-noble",
+				"9.0-jammy",
                 "8.0-jammy",
                 "6.0-jammy",
                 "6.0-focal"
             ],
-            "default": "8.0-bookworm"
+            "default": "9.0-bookworm"
         }
     },
     "platforms": [
diff --git a/src/dotnet/README.md b/src/dotnet/README.md
index 567768d..ea1c30e 100644
--- a/src/dotnet/README.md
+++ b/src/dotnet/README.md
@@ -7,7 +7,7 @@ Develop C# and .NET based applications. Includes all needed SDKs, extensions, an
 
 | Options Id | Description | Type | Default Value |
 |-----|-----|-----|-----|
-| imageVariant | .NET version: | string | 8.0-bookworm |
+| imageVariant | .NET version: | string | 9.0-bookworm |
 
 This template references an image that was [pre-built](https://containers.dev/implementors/reference/#prebuilding) to automatically include needed devcontainer.json metadata.
 
diff --git a/src/dotnet/devcontainer-template.json b/src/dotnet/devcontainer-template.json
index bde5915..4fff88f 100644
--- a/src/dotnet/devcontainer-template.json
+++ b/src/dotnet/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "dotnet",
-    "version": "3.2.2",
+    "version": "3.3.0",
     "name": "C# (.NET)",
     "description": "Develop C# and .NET based applications. Includes all needed SDKs, extensions, and dependencies.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/dotnet",
@@ -11,17 +11,20 @@
             "type": "string",
             "description": ".NET version:",
             "proposals": [
+				"9.0",
                 "8.0",
                 "6.0",
+				"9.0-bookworm",
                 "8.0-bookworm",
                 "6.0-bookworm",
                 "6.0-bullseye",
                 "8.0-noble",
+				"9.0-jammy",
 				"8.0-jammy",
                 "6.0-jammy",
                 "6.0-focal"
             ],
-            "default": "8.0-bookworm"
+            "default": "9.0-bookworm"
         }
     },
     "platforms": [