diff --git a/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache b/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
index e008a6d830e..7ad585b9378 100644
--- a/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-axios/apiInner.mustache
@@ -189,9 +189,14 @@ export const {{classname}}AxiosParamCreator = function (configuration?: Configur
             {{#isArray}}
             if ({{paramName}}) {
             {{#isCollectionFormatMulti}}
+              {{#contentType}}
+                localVarFormParams.append('{{baseName}}', new Blob([JSON.stringify({{paramName}})], { type: "{{contentType}}", }));
+              {{/contentType}}
+              {{^contentType}}
                 {{paramName}}.forEach((element) => {
-                    localVarFormParams.{{#multipartFormData}}append{{/multipartFormData}}{{^multipartFormData}}set{{/multipartFormData}}('{{baseName}}', element as any);
+                  localVarFormParams.{{#multipartFormData}}append{{/multipartFormData}}{{^multipartFormData}}set{{/multipartFormData}}('{{baseName}}', element as any);
                 })
+              {{/contentType}}
             {{/isCollectionFormatMulti}}
             {{^isCollectionFormatMulti}}
                 localVarFormParams.{{#multipartFormData}}append{{/multipartFormData}}{{^multipartFormData}}set{{/multipartFormData}}('{{baseName}}', {{paramName}}.join(COLLECTION_FORMATS.{{collectionFormat}}));
diff --git a/samples/client/echo_api/typescript-axios/build/api.ts b/samples/client/echo_api/typescript-axios/build/api.ts
index 384ba1cdfc3..f22a7e72cca 100644
--- a/samples/client/echo_api/typescript-axios/build/api.ts
+++ b/samples/client/echo_api/typescript-axios/build/api.ts
@@ -615,7 +615,7 @@ export const BodyApiAxiosParamCreator = function (configuration?: Configuration)
 
             if (files) {
                 files.forEach((element) => {
-                    localVarFormParams.append('files', element as any);
+                  localVarFormParams.append('files', element as any);
                 })
             }