diff --git a/packages/allure-cucumberjs/src/CucumberAllureInterface.ts b/packages/allure-cucumberjs/src/CucumberAllureInterface.ts
index 43d3736e1..06374cba9 100644
--- a/packages/allure-cucumberjs/src/CucumberAllureInterface.ts
+++ b/packages/allure-cucumberjs/src/CucumberAllureInterface.ts
@@ -2,6 +2,7 @@ import {
   Allure,
   AllureStep,
   AllureTest,
+  AttachmentOptions,
   ContentType,
   ExecutableItemWrapper,
   isPromise,
@@ -61,14 +62,14 @@ export class CucumberAllureInterface extends Allure {
     this.step(name, () => {}); // todo status
   }
 
-  attachment(name: string, content: Buffer | string, type: ContentType) {
-    const file = this.reporter.writeAttachment(content, type);
-    this.currentExecutable.addAttachment(name, type, file);
+  attachment(name: string, content: Buffer | string, options: ContentType | string | AttachmentOptions) {
+    const file = this.reporter.writeAttachment(content, options);
+    this.currentExecutable.addAttachment(name, options, file);
   }
 
-  testAttachment(name: string, content: Buffer | string, type: ContentType) {
-    const file = this.reporter.writeAttachment(content, type);
-    this.currentTest.addAttachment(name, type, file);
+  testAttachment(name: string, content: Buffer | string, options: ContentType | string | AttachmentOptions) {
+    const file = this.reporter.writeAttachment(content, options);
+    this.currentTest.addAttachment(name, options, file);
   }
 
   addParameter(name: string, value: string): void {
diff --git a/packages/allure-cucumberjs/src/CucumberJSAllureReporter.ts b/packages/allure-cucumberjs/src/CucumberJSAllureReporter.ts
index 14a72f8a7..a4eeb9af1 100644
--- a/packages/allure-cucumberjs/src/CucumberJSAllureReporter.ts
+++ b/packages/allure-cucumberjs/src/CucumberJSAllureReporter.ts
@@ -5,6 +5,7 @@ import {
   AllureRuntime,
   AllureStep,
   AllureTest,
+  AttachmentOptions,
   ContentType,
   ExecutableItemWrapper,
   LabelName
@@ -239,7 +240,9 @@ export class CucumberJSAllureFormatter extends Formatter {
 
     if (step.argument !== undefined) {
       if (step.argument.content !== undefined) {
-        const file = this.allureRuntime.writeAttachment(step.argument.content, ContentType.TEXT);
+        const file = this.allureRuntime.writeAttachment(step.argument.content, {
+          contentType: ContentType.TEXT,
+        });
         allureStep.addAttachment("Text", ContentType.TEXT, file);
       }
       if (step.argument.rows !== undefined) {
@@ -249,7 +252,7 @@ export class CucumberJSAllureFormatter extends Formatter {
               cell => cell.value.replace(/\t/g, "    ")
             ).join("\t")
           ).join("\n"),
-          ContentType.TSV
+          { contentType: ContentType.TSV }
         );
         allureStep.addAttachment("Table", ContentType.TSV, file);
       }
@@ -264,7 +267,7 @@ export class CucumberJSAllureFormatter extends Formatter {
     if ([ContentType.JPEG, ContentType.PNG, ContentType.WEBM].indexOf(type) >= 0) {
       content = Buffer.from(content, "base64");
     }
-    const file = this.allureRuntime.writeAttachment(content, type);
+    const file = this.allureRuntime.writeAttachment(content, { contentType: type });
     this.currentStep.addAttachment("attached", type, file);
   }
 
@@ -315,8 +318,8 @@ export class CucumberJSAllureFormatter extends Formatter {
     return null;
   }
 
-  writeAttachment(content: Buffer | string, type: ContentType): string {
-    return this.allureRuntime.writeAttachment(content, type);
+  writeAttachment(content: Buffer | string, options: ContentType | string | AttachmentOptions): string {
+    return this.allureRuntime.writeAttachment(content, options);
   }
 }
 
diff --git a/packages/allure-jasmine/src/JasmineAllureReporter.ts b/packages/allure-jasmine/src/JasmineAllureReporter.ts
index d2f36eea1..01608186a 100644
--- a/packages/allure-jasmine/src/JasmineAllureReporter.ts
+++ b/packages/allure-jasmine/src/JasmineAllureReporter.ts
@@ -3,6 +3,7 @@ import {
   AllureRuntime,
   AllureStep,
   AllureTest,
+  AttachmentOptions,
   ContentType,
   ExecutableItemWrapper,
   isPromise,
@@ -65,8 +66,8 @@ export class JasmineAllureReporter implements jasmine.CustomReporter {
     return this.runningExecutable;
   }
 
-  writeAttachment(content: Buffer | string, type: ContentType): string {
-    return this.runtime.writeAttachment(content, type);
+  writeAttachment(content: Buffer | string, options: ContentType | string | AttachmentOptions): string {
+    return this.runtime.writeAttachment(content, options);
   }
 
   jasmineStarted(suiteInfo: jasmine.SuiteInfo): void {
@@ -315,9 +316,9 @@ export class JasmineAllureInterface extends Allure {
     this.step(name, () => {}); // todo status
   }
 
-  attachment(name: string, content: Buffer | string, type: ContentType) {
-    const file = this.reporter.writeAttachment(content, type);
-    this.currentExecutable.addAttachment(name, type, file);
+  attachment(name: string, content: Buffer | string, options: ContentType | string | AttachmentOptions) {
+    const file = this.reporter.writeAttachment(content, options);
+    this.currentExecutable.addAttachment(name, options, file);
   }
 }
 
diff --git a/packages/allure-js-commons/index.ts b/packages/allure-js-commons/index.ts
index fefc4ad57..8d67f744a 100644
--- a/packages/allure-js-commons/index.ts
+++ b/packages/allure-js-commons/index.ts
@@ -8,6 +8,7 @@ export { AllureStep } from "./src/ExecutableItemWrapper";
 export { isPromise } from "./src/isPromise";
 export { Allure, StepInterface } from "./src/Allure";
 export {
+  AttachmentOptions,
   Attachment,
   Category,
   StepResult,
diff --git a/packages/allure-js-commons/src/Allure.ts b/packages/allure-js-commons/src/Allure.ts
index 20483fdd7..e462d78d7 100644
--- a/packages/allure-js-commons/src/Allure.ts
+++ b/packages/allure-js-commons/src/Allure.ts
@@ -1,4 +1,4 @@
-import { Category, LinkType, Status } from "./model";
+import { AttachmentOptions, Category, LinkType, Status } from "./model";
 import { ContentType } from "./model";
 import { LabelName } from "./model";
 import { AllureTest } from "./AllureTest";
@@ -63,7 +63,11 @@ export abstract class Allure {
     this.currentExecutable.descriptionHtml = html;
   }
 
-  public abstract attachment(name: string, content: Buffer | string, type: ContentType): void;
+  public abstract attachment(
+    name: string,
+    content: Buffer | string,
+    options: ContentType | string | AttachmentOptions
+  ): void;
 
   public owner(owner: string): void {
     this.label(LabelName.OWNER, owner);
diff --git a/packages/allure-js-commons/src/AllureRuntime.ts b/packages/allure-js-commons/src/AllureRuntime.ts
index c948f5645..2c477af37 100644
--- a/packages/allure-js-commons/src/AllureRuntime.ts
+++ b/packages/allure-js-commons/src/AllureRuntime.ts
@@ -1,4 +1,4 @@
-import { Category, ContentType, TestResult, TestResultContainer } from "./model";
+import { AttachmentOptions, Category, ContentType, TestResult, TestResultContainer } from "./model";
 import { v4 as randomUUID } from "uuid";
 import { IAllureConfig } from "./AllureConfig";
 import { AllureGroup } from "./AllureGroup";
@@ -28,8 +28,11 @@ export class AllureRuntime {
     this.writer.writeGroup(result);
   }
 
-  writeAttachment(content: Buffer | string, contentType: ContentType): string {
-    const extension = typeToExtension(contentType);
+  writeAttachment(content: Buffer | string, options: ContentType | string | AttachmentOptions) {
+    if (typeof options === "string") {
+      options = { contentType: options };
+    }
+    const extension = typeToExtension(options);
     const fileName = `${randomUUID()}-attachment.${extension}`;
     this.writer.writeAttachment(fileName, content);
     return fileName;
diff --git a/packages/allure-js-commons/src/ExecutableItemWrapper.ts b/packages/allure-js-commons/src/ExecutableItemWrapper.ts
index 1fde6d647..f2705ba40 100644
--- a/packages/allure-js-commons/src/ExecutableItemWrapper.ts
+++ b/packages/allure-js-commons/src/ExecutableItemWrapper.ts
@@ -1,4 +1,5 @@
 import {
+  AttachmentOptions,
   StatusDetails,
   StepResult,
   FixtureResult,
@@ -58,9 +59,11 @@ export class ExecutableItemWrapper {
     this.info.parameters.push({ name, value });
   }
 
-  public addAttachment(name: string, type: ContentType, fileName: string) {
-    // eslint-disable-next-line object-shorthand
-    this.info.attachments.push({ name, type, source: fileName });
+  public addAttachment(name: string, options: ContentType | string | AttachmentOptions, fileName: string) {
+    if (typeof options === "string") {
+      options = { contentType: options };
+    }
+    this.info.attachments.push({ name, type: options.contentType, source: fileName });
   }
 
   public startStep(name: string, start?: number): AllureStep {
diff --git a/packages/allure-js-commons/src/model.ts b/packages/allure-js-commons/src/model.ts
index d4799ce59..0882d37e3 100644
--- a/packages/allure-js-commons/src/model.ts
+++ b/packages/allure-js-commons/src/model.ts
@@ -4,6 +4,11 @@ export interface Attachment {
   source: string
 }
 
+export interface AttachmentOptions {
+  contentType: ContentType | string,
+  fileExtension?: string;
+}
+
 export interface Label {
   name: LabelName | string
   value: string
@@ -121,7 +126,6 @@ export enum LabelName {
   LANGUAGE = "language",
 }
 
-/* eslint-disable no-undef */
 export enum Severity {
   BLOCKER = "blocker",
   CRITICAL = "critical",
diff --git a/packages/allure-js-commons/src/writers/utils.ts b/packages/allure-js-commons/src/writers/utils.ts
index af16fc608..d89c4b166 100644
--- a/packages/allure-js-commons/src/writers/utils.ts
+++ b/packages/allure-js-commons/src/writers/utils.ts
@@ -1,7 +1,10 @@
-import { ContentType } from "../model";
+import { AttachmentOptions, ContentType } from "../model";
 
-export function typeToExtension(type: ContentType): string {
-  switch (type) {
+export function typeToExtension(options: AttachmentOptions): string {
+  if (options.fileExtension) {
+    return options.fileExtension;
+  }
+  switch (options.contentType) {
     case ContentType.TEXT:
       return "txt";
     case ContentType.XML:
@@ -25,5 +28,5 @@ export function typeToExtension(type: ContentType): string {
     case ContentType.JPEG:
       return "jpg";
   }
-  throw new Error(`Unrecognized extension: ${type}`);
+  throw new Error(`Unrecognized extension: ${options.contentType}`);
 }
diff --git a/packages/allure-mocha/src/AllureReporter.ts b/packages/allure-mocha/src/AllureReporter.ts
index d8bd927fd..0ce181352 100644
--- a/packages/allure-mocha/src/AllureReporter.ts
+++ b/packages/allure-mocha/src/AllureReporter.ts
@@ -3,6 +3,7 @@ import {
   AllureRuntime,
   AllureStep,
   AllureTest,
+  AttachmentOptions,
   ContentType,
   ExecutableItemWrapper,
   LabelName,
@@ -134,8 +135,8 @@ export class AllureReporter {
     this.endTest(status, { message: error.message, trace: error.stack });
   }
 
-  public writeAttachment(content: Buffer | string, type: ContentType): string {
-    return this.allureRuntime.writeAttachment(content, type);
+  public writeAttachment(content: Buffer | string, options: ContentType | string | AttachmentOptions): string {
+    return this.allureRuntime.writeAttachment(content, options);
   }
 
   public pushStep(step: AllureStep): void {
diff --git a/packages/allure-mocha/src/MochaAllure.ts b/packages/allure-mocha/src/MochaAllure.ts
index c30657fb7..68f4413e5 100644
--- a/packages/allure-mocha/src/MochaAllure.ts
+++ b/packages/allure-mocha/src/MochaAllure.ts
@@ -3,6 +3,7 @@ import {
   AllureRuntime,
   AllureStep,
   AllureTest,
+  AttachmentOptions,
   ContentType,
   ExecutableItemWrapper,
   isPromise,
@@ -60,14 +61,18 @@ export class MochaAllure extends Allure {
     }); // todo status
   }
 
-  public attachment(name: string, content: Buffer | string, type: ContentType): void {
-    const file = this.reporter.writeAttachment(content, type);
-    this.currentExecutable.addAttachment(name, type, file);
+  public attachment(name: string, content: Buffer | string, options: ContentType | string | AttachmentOptions): void {
+    const file = this.reporter.writeAttachment(content, options);
+    this.currentExecutable.addAttachment(name, options, file);
   }
 
-  public testAttachment(name: string, content: Buffer | string, type: ContentType): void {
-    const file = this.reporter.writeAttachment(content, type);
-    this.currentTest.addAttachment(name, type, file);
+  public testAttachment(
+    name: string,
+    content: Buffer | string,
+    options: ContentType | string | AttachmentOptions
+  ): void {
+    const file = this.reporter.writeAttachment(content, options);
+    this.currentTest.addAttachment(name, options, file);
   }
 
   public get currentTest(): AllureTest {
diff --git a/packages/allure-mocha/test/fixtures/specs/attachment.ts b/packages/allure-mocha/test/fixtures/specs/attachment.ts
index 2f138451f..5759d6eb1 100644
--- a/packages/allure-mocha/test/fixtures/specs/attachment.ts
+++ b/packages/allure-mocha/test/fixtures/specs/attachment.ts
@@ -16,5 +16,9 @@ class AttachmentSubSuite {
       allure.attachment("step 2 attachment 2", "step 2 attachment 2 content", ContentType.TEXT);
     });
     allure.testAttachment("test attachment 2", "{ \"key\": \"value\" }", ContentType.JSON);
+    allure.testAttachment("custom-attachment", "{}", {
+      contentType: "application/vnd.something.custom",
+      fileExtension: "json",
+    });
   }
 }
diff --git a/packages/allure-mocha/test/specs/attachments.ts b/packages/allure-mocha/test/specs/attachments.ts
index b8c8699a1..fdaf9f6a8 100644
--- a/packages/allure-mocha/test/specs/attachments.ts
+++ b/packages/allure-mocha/test/specs/attachments.ts
@@ -15,11 +15,14 @@ class AttachmentsSuite {
     expect(test).not.eq(undefined);
     expect(test.status).eq(Status.PASSED);
 
-    expect(test.attachments).length(2);
+    expect(test.attachments).length(3);
     expect(test.attachments[0].name).eq("test attachment 1");
     expect(test.attachments[0].type).eq("text/plain");
     expect(test.attachments[1].name).eq("test attachment 2");
     expect(test.attachments[1].type).eq("application/json");
+    expect(test.attachments[2].name).eq("custom-attachment");
+    expect(test.attachments[2].type).eq("application/vnd.something.custom");
+    expect(test.attachments[2].source).matches(/\.json$/);
 
     expect(test.steps).length(2);