diff --git a/packages/kubernetes-typescript-client-codegen-openapi/package.json b/packages/kubernetes-typescript-client-codegen-openapi/package.json
index fa72c882..aed49c59 100644
--- a/packages/kubernetes-typescript-client-codegen-openapi/package.json
+++ b/packages/kubernetes-typescript-client-codegen-openapi/package.json
@@ -1,6 +1,6 @@
 {
   "name": "kubernetes-typescript-client-codegen-openapi",
-  "version": "0.0.12",
+  "version": "0.0.13",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "author": "kahirokunn",
@@ -20,7 +20,7 @@
     "format": "prettier --write \"src/**/*.ts\"",
     "esm:test:update": "NODE_OPTIONS=--experimental-vm-modules jest --runInBand --updateSnapshot",
     "test:update": "jest --runInBand --updateSnapshot",
-    "test": "jest --runInBand",
+    "test": "jest --runInBand --silent=false",
     "cli": "esr src/bin/cli.ts"
   },
   "files": [
diff --git a/packages/kubernetes-typescript-client-codegen-openapi/src/generate.ts b/packages/kubernetes-typescript-client-codegen-openapi/src/generate.ts
index 36385867..4515dda5 100644
--- a/packages/kubernetes-typescript-client-codegen-openapi/src/generate.ts
+++ b/packages/kubernetes-typescript-client-codegen-openapi/src/generate.ts
@@ -72,6 +72,7 @@ export async function generateApi(
     isDataResponse = defaultIsDataResponse,
     filterEndpoints,
     unionUndefined = true,
+    strict = true,
   }: GenerationOptions
 ) {
   const v3Doc = await getV3Doc(spec);
@@ -347,7 +348,7 @@ export async function generateApi(
       [
         factory.createPropertyAssignment(
           factory.createIdentifier('path'),
-          generatePathExpression(path, pickParams('path'), rootObject)
+          generatePathExpression(path, pickParams('path'), rootObject, strict)
         ),
         verb.toUpperCase() === 'GET'
           ? undefined
@@ -382,13 +383,30 @@ function accessProperty(rootObject: ts.Identifier, propertyName: string) {
     : factory.createElementAccessExpression(rootObject, factory.createStringLiteral(propertyName));
 }
 
-function generatePathExpression(path: string, pathParameters: QueryArgDefinition[], rootObject: ts.Identifier) {
+function generatePathExpression(path: string, pathParameters: QueryArgDefinition[], rootObject: ts.Identifier, strict: boolean) {
   const expressions: Array<[string, string]> = [];
 
   const head = path.replace(/\{(.*?)\}(.*?)(?=\{|$)/g, (_, expression, literal) => {
-    const param = pathParameters.find((p) => p.originalName === expression);
+    let param = pathParameters.find((p) => p.originalName === expression);
     if (!param) {
-      throw new Error(`path parameter ${expression} does not seem to be defined in '${path}'!`);
+      if (strict) {
+        throw new Error(`path parameter ${expression} does not seem to be defined in '${path}'!`);
+      }
+      param = {
+        origin: 'param',
+        name: expression,
+        originalName: expression,
+        type: factory.createToken(ts.SyntaxKind.StringKeyword),
+        required: true,
+        param: {
+          name: expression,
+          in: 'path',
+          description: 'The name that needs to be deleted',
+          required: true,
+          schema: { type: 'string' },
+        },
+      };
+      pathParameters.push(param);
     }
     expressions.push([param.name, literal]);
     return '';
diff --git a/packages/kubernetes-typescript-client-codegen-openapi/src/types.ts b/packages/kubernetes-typescript-client-codegen-openapi/src/types.ts
index 002803e3..5ed6fe15 100644
--- a/packages/kubernetes-typescript-client-codegen-openapi/src/types.ts
+++ b/packages/kubernetes-typescript-client-codegen-openapi/src/types.ts
@@ -55,6 +55,12 @@ export interface CommonOptions {
    * `true` will generate a union type for `undefined` properties like: `{ id?: string | undefined }` instead of `{ id?: string }`
    */
   unionUndefined?: boolean;
+
+  /**
+   * defaults to true
+   * If `true`, an error will occur if the path parameter does not exist, but if `false`, it will be automatically filled in as a string.
+   */
+  strict?: boolean;
 }
 
 export type TextMatcher = string | RegExp | (string | RegExp)[];
diff --git a/packages/kubernetes-typescript-client-codegen-openapi/test/cli.test.ts b/packages/kubernetes-typescript-client-codegen-openapi/test/cli.test.ts
index e97d218b..e00884ea 100644
--- a/packages/kubernetes-typescript-client-codegen-openapi/test/cli.test.ts
+++ b/packages/kubernetes-typescript-client-codegen-openapi/test/cli.test.ts
@@ -4,6 +4,26 @@ import * as fs from 'fs';
 import path from 'path';
 import del from 'del';
 
+function strictCli(
+  args: string[],
+  cwd: string
+): Promise<{ error: ExecException | null; stdout: string; stderr: string }> {
+  const pwd = (process.env && process.env.PWD) || '.';
+  const cmd = `${require.resolve('ts-node/dist/bin')} -T -P ${path.resolve(pwd, 'tsconfig.json')} ${path.resolve(
+    pwd,
+    'src/bin/cli.ts'
+  )} ${args.join(' ')}`;
+  return new Promise((resolve) => {
+    exec(cmd, { cwd }, (error, stdout, stderr) => {
+      resolve({
+        error,
+        stdout,
+        stderr,
+      });
+    });
+  });
+}
+
 function cli(args: string[], cwd: string): Promise<{ error: ExecException | null; stdout: string; stderr: string }> {
   const pwd = (process.env && process.env.PWD) || '.';
   const cmd = `${require.resolve('ts-node/dist/bin')} -T -P ${path.resolve(pwd, 'tsconfig.json')} ${path.resolve(
@@ -33,7 +53,7 @@ afterEach(() => {
 
 describe('CLI options testing', () => {
   test('generation with `config.example.js`', async () => {
-    const out = await cli([`./config.example.js`], __dirname);
+    const out = await strictCli([`./config.example.js`], __dirname);
 
     expect(out).toEqual({
       stdout: `Generating ./tmp/example.ts
@@ -47,7 +67,7 @@ Done
   }, 25000);
 
   test('paths are relative to configfile, not to cwd', async () => {
-    const out = await cli([`../test/config.example.js`], path.resolve(__dirname, '../src'));
+    const out = await strictCli([`../test/config.example.js`], path.resolve(__dirname, '../src'));
 
     expect(out).toEqual({
       stdout: `Generating ./tmp/example.ts
@@ -61,19 +81,24 @@ Done
   }, 25000);
 
   test('ts, js and json all work the same', async () => {
-    await cli([`./config.example.js`], __dirname);
+    await strictCli([`./config.example.js`], __dirname);
     const fromJs = fs.readFileSync(path.resolve(tmpDir, 'example.ts'), 'utf-8');
-    await cli([`./config.example.ts`], __dirname);
+    await strictCli([`./config.example.ts`], __dirname);
     const fromTs = fs.readFileSync(path.resolve(tmpDir, 'example.ts'), 'utf-8');
-    await cli([`./config.example.json`], __dirname);
+    await strictCli([`./config.example.json`], __dirname);
     const fromJson = fs.readFileSync(path.resolve(tmpDir, 'example.ts'), 'utf-8');
 
     expect(fromTs).toEqual(fromJs);
     expect(fromJson).toEqual(fromJs);
   }, 45000);
 
-  test('missing parameters doesnt fail', async () => {
-    const out = await cli([`./config.invalid-example.json`], __dirname);
+  test("missing parameters doesn't fail", async () => {
+    const out = await strictCli([`./config.invalid-example.json`], __dirname);
     expect(out.stderr).toContain("Error: path parameter petId does not seem to be defined in '/pet/{petId}'!");
   }, 25000);
+
+  test('missing path parameters does fail', async () => {
+    const out = await cli([`./config.valid-example.ts`], __dirname);
+    expect(out.stderr).not.toContain("Error: path parameter petId does not seem to be defined in '/pet/{petId}'!");
+  }, 25000);
 });
diff --git a/packages/kubernetes-typescript-client-codegen-openapi/test/config.valid-example.ts b/packages/kubernetes-typescript-client-codegen-openapi/test/config.valid-example.ts
new file mode 100644
index 00000000..280b3180
--- /dev/null
+++ b/packages/kubernetes-typescript-client-codegen-openapi/test/config.valid-example.ts
@@ -0,0 +1,10 @@
+import type { ConfigFile } from 'kahirokunn/kubernetes-typescript-client-codegen-openapi';
+
+const config: ConfigFile = {
+  schemaFile: './fixtures/invalid-petstore.json',
+  apiFile: './fixtures/k8sApiClient.ts',
+  outputFile: './tmp/example.ts',
+  strict: false,
+};
+
+export default config;