diff --git a/.changeset/hot-toys-fly.md b/.changeset/hot-toys-fly.md
new file mode 100644
index 0000000..6df9d24
--- /dev/null
+++ b/.changeset/hot-toys-fly.md
@@ -0,0 +1,6 @@
+---
+"@notation/aws.iac": minor
+"@notation/aws": minor
+---
+
+Support alternative runtimes
diff --git a/examples/lambda-external/external/lambda.py b/examples/lambda-external/external/lambda.py
new file mode 100644
index 0000000..5db0ba8
--- /dev/null
+++ b/examples/lambda-external/external/lambda.py
@@ -0,0 +1,8 @@
+import json
+
+def handler(event, context):
+    print("event", event)
+    return {
+        'statusCode': 200,
+        'body': json.dumps({'message': 'Hello, world!'})
+    }
diff --git a/examples/lambda-external/infra/api.ts b/examples/lambda-external/infra/api.ts
index af9e02b..16acef8 100644
--- a/examples/lambda-external/infra/api.ts
+++ b/examples/lambda-external/infra/api.ts
@@ -1,8 +1,13 @@
 import { api, router } from "@notation/aws/api-gateway";
-import { externalJsLambda, externalZipLambda } from "./lambda";
+import {
+  externalJsLambda,
+  externalZipLambda,
+  externalPyLambda,
+} from "./lambda";
 
 const helloApi = api({ name: "hello-api" });
 const helloRouter = router(helloApi);
 
 helloRouter.get("/hello1", externalJsLambda);
 helloRouter.get("/hello2", externalZipLambda);
+helloRouter.get("/hello3", externalPyLambda);
diff --git a/examples/lambda-external/infra/lambda.ts b/examples/lambda-external/infra/lambda.ts
index 039626a..aa1acac 100644
--- a/examples/lambda-external/infra/lambda.ts
+++ b/examples/lambda-external/infra/lambda.ts
@@ -17,3 +17,13 @@ export const externalZipLambda = lambda({
     path: "external/lambda.zip",
   },
 });
+
+export const externalPyLambda = lambda({
+  id: "external-py",
+  handler: "handler",
+  code: {
+    type: "file",
+    path: "external/lambda.py",
+  },
+  runtime: "python3.12",
+});
diff --git a/packages/aws.iac/src/resources/lambda/lambda.ts b/packages/aws.iac/src/resources/lambda/lambda.ts
index 779a2bd..241495b 100644
--- a/packages/aws.iac/src/resources/lambda/lambda.ts
+++ b/packages/aws.iac/src/resources/lambda/lambda.ts
@@ -188,6 +188,7 @@ const lambdaFunctionSchema = lambdaFunction.defineSchema({
   Runtime: {
     valueType: z.enum([
       "dotnet6",
+      "dotnet8",
       "dotnetcore1.0",
       "dotnetcore2.0",
       "dotnetcore2.1",
@@ -205,6 +206,7 @@ const lambdaFunctionSchema = lambdaFunction.defineSchema({
       "nodejs16.x",
       "nodejs18.x",
       "nodejs20.x",
+      "nodejs22.x",
       "nodejs4.3",
       "nodejs4.3-edge",
       "nodejs6.10",
@@ -216,6 +218,7 @@ const lambdaFunctionSchema = lambdaFunction.defineSchema({
       "python3.10",
       "python3.11",
       "python3.12",
+      "python3.13",
       "python3.6",
       "python3.7",
       "python3.8",
@@ -223,6 +226,7 @@ const lambdaFunctionSchema = lambdaFunction.defineSchema({
       "ruby2.5",
       "ruby2.7",
       "ruby3.2",
+      "ruby3.3",
     ]),
     propertyType: "param",
     presence: "optional",
@@ -381,3 +385,7 @@ export const LambdaFunction = lambdaFunctionSchema
   }));
 
 export type LambdaFunctionInstance = InstanceType<typeof LambdaFunction>;
+
+export type LambdaFunctionConfig = ConstructorParameters<
+  typeof LambdaFunction
+>[0]["config"];
diff --git a/packages/aws/src/lambda/lambda.ts b/packages/aws/src/lambda/lambda.ts
index ec1a174..0b6cc3a 100644
--- a/packages/aws/src/lambda/lambda.ts
+++ b/packages/aws/src/lambda/lambda.ts
@@ -10,9 +10,10 @@ type LambdaConfig = {
     type: "file" | "zip";
     path: string;
   };
+  runtime?: aws.lambda.LambdaFunctionConfig["Runtime"];
 };
 
-export const lambda = (config: LambdaConfig) => {
+export const lambda = (config: LambdaConfig): aws.AwsResourceGroup => {
   const functionGroup = new aws.AwsResourceGroup("Lambda", { config });
   const filePath = config.code.path;
 
@@ -63,6 +64,7 @@ export const lambda = (config: LambdaConfig) => {
   );
 
   const fileName = path.parse(filePath).name;
+  const runtime = config.runtime || "nodejs22.x";
 
   const lambdaResource = functionGroup.add(
     new aws.lambda.LambdaFunction({
@@ -70,7 +72,7 @@ export const lambda = (config: LambdaConfig) => {
       config: {
         FunctionName: lambdaId,
         Handler: `${fileName}.${config.handler}`,
-        Runtime: "nodejs18.x",
+        Runtime: runtime,
         // todo: make this configurable and remove it as a default
         ReservedConcurrentExecutions: 1,
       },