diff --git a/src/openApi/v3/parser/getOperationParameterName.spec.ts b/src/openApi/v3/parser/getOperationParameterName.spec.ts
index 72501153..07074959 100644
--- a/src/openApi/v3/parser/getOperationParameterName.spec.ts
+++ b/src/openApi/v3/parser/getOperationParameterName.spec.ts
@@ -13,5 +13,7 @@ describe('getOperationParameterName', () => {
         expect(getOperationParameterName('123.foo.bar')).toEqual('fooBar');
         expect(getOperationParameterName('Foo-Bar')).toEqual('fooBar');
         expect(getOperationParameterName('FOO-BAR')).toEqual('fooBar');
+        expect(getOperationParameterName('foo[bar]')).toEqual('fooBar');
+        expect(getOperationParameterName('foo.bar[]')).toEqual('fooBarArray');
     });
 });
diff --git a/src/openApi/v3/parser/getOperationParameterName.ts b/src/openApi/v3/parser/getOperationParameterName.ts
index 3a7fb408..a3caa291 100644
--- a/src/openApi/v3/parser/getOperationParameterName.ts
+++ b/src/openApi/v3/parser/getOperationParameterName.ts
@@ -9,6 +9,7 @@ import { reservedWords } from '../../../utils/reservedWords';
 export const getOperationParameterName = (value: string): string => {
     const clean = value
         .replace(/^[^a-zA-Z]+/g, '')
+        .replace('[]', 'Array')
         .replace(/[^\w\-]+/g, '-')
         .trim();
     return camelCase(clean).replace(reservedWords, '_$1');
diff --git a/src/templates/core/OpenAPI.hbs b/src/templates/core/OpenAPI.hbs
index 19e66fbf..7b9560a2 100644
--- a/src/templates/core/OpenAPI.hbs
+++ b/src/templates/core/OpenAPI.hbs
@@ -10,11 +10,11 @@ export type OpenAPIConfig = {
 	VERSION: string;
 	WITH_CREDENTIALS: boolean;
 	CREDENTIALS: 'include' | 'omit' | 'same-origin';
-	TOKEN?: string | Resolver<string>;
-	USERNAME?: string | Resolver<string>;
-	PASSWORD?: string | Resolver<string>;
-	HEADERS?: Headers | Resolver<Headers>;
-	ENCODE_PATH?: (path: string) => string;
+	TOKEN?: string | Resolver<string> | undefined;
+	USERNAME?: string | Resolver<string> | undefined;
+	PASSWORD?: string | Resolver<string> | undefined;
+	HEADERS?: Headers | Resolver<Headers> | undefined;
+	ENCODE_PATH?: ((path: string) => string) | undefined;
 };
 
 export const OpenAPI: OpenAPIConfig = {