diff --git a/README.md b/README.md
index 7c2eb928..5b76db06 100644
--- a/README.md
+++ b/README.md
@@ -212,7 +212,6 @@ You can use all of the following options with the standalone version of the <red
 * `generatedPayloadSamplesMaxDepth` - set the maximum render depth for JSON payload samples (responses and request body). The default value is `10`.
 * `maxDisplayedEnumValues` - display only specified number of enum values. hide rest values under spoiler.
 * `hideDownloadButton` - do not show "Download" spec button. **THIS DOESN'T MAKE YOUR SPEC PRIVATE**, it just hides the button.
-* `downloadFileName` - set a custom file name for the downloaded API definition file. The file is always in JSON format regardless of the file extension you set with this option. The default file name is `openapi.json`. **This option is supported only in redoc-cli**.
 * `hideHostname` - if set, the protocol and hostname is not shown in the operation definition.
 * `hideLoading` - do not show loading animation. Useful for small docs.
 * `hideFab` - do not show FAB in mobile view. Useful for implementing a custom floating action button.
diff --git a/src/services/RedocNormalizedOptions.ts b/src/services/RedocNormalizedOptions.ts
index e55178f1..291c1adb 100644
--- a/src/services/RedocNormalizedOptions.ts
+++ b/src/services/RedocNormalizedOptions.ts
@@ -27,7 +27,7 @@ export interface RedocRawOptions {
   untrustedSpec?: boolean | string;
   hideLoading?: boolean | string;
   hideDownloadButton?: boolean | string;
-  downloadFileName?: string;
+  downloadDefinitionUrl?: string;
   disableSearch?: boolean | string;
   onlyRequiredInSamples?: boolean | string;
   showExtensions?: boolean | string | string[];
@@ -226,7 +226,7 @@ export class RedocNormalizedOptions {
   pathInMiddlePanel: boolean;
   untrustedSpec: boolean;
   hideDownloadButton: boolean;
-  downloadFileName: string;
+  downloadDefinitionUrl?: string;
   disableSearch: boolean;
   onlyRequiredInSamples: boolean;
   showExtensions: boolean | string[];
@@ -293,7 +293,7 @@ export class RedocNormalizedOptions {
     this.pathInMiddlePanel = argValueToBoolean(raw.pathInMiddlePanel);
     this.untrustedSpec = argValueToBoolean(raw.untrustedSpec);
     this.hideDownloadButton = argValueToBoolean(raw.hideDownloadButton);
-    this.downloadFileName = raw.downloadFileName || 'openapi.json';
+    this.downloadDefinitionUrl = raw.downloadDefinitionUrl;
     this.disableSearch = argValueToBoolean(raw.disableSearch);
     this.onlyRequiredInSamples = argValueToBoolean(raw.onlyRequiredInSamples);
     this.showExtensions = RedocNormalizedOptions.normalizeShowExtensions(raw.showExtensions);
diff --git a/src/services/__tests__/models/ApiInfo.test.ts b/src/services/__tests__/models/ApiInfo.test.ts
index 85390067..a785f7c3 100644
--- a/src/services/__tests__/models/ApiInfo.test.ts
+++ b/src/services/__tests__/models/ApiInfo.test.ts
@@ -83,9 +83,11 @@ describe('Models', () => {
         },
       } as any;
 
-      const opts = new RedocNormalizedOptions({ downloadFileName: 'filename.json' });
+      const opts = new RedocNormalizedOptions({
+        downloadDefinitionUrl: 'https:test.com/filename.yaml',
+      });
       const info = new ApiInfoModel(parser, opts);
-      expect(info.downloadFileName).toEqual('filename.json');
+      expect(info.downloadFileName).toEqual(undefined);
     });
   });
 });
diff --git a/src/services/models/ApiInfo.ts b/src/services/models/ApiInfo.ts
index e9172443..b5d71802 100644
--- a/src/services/models/ApiInfo.ts
+++ b/src/services/models/ApiInfo.ts
@@ -34,6 +34,10 @@ export class ApiInfoModel implements OpenAPIInfo {
   }
 
   private getDownloadLink(): string | undefined {
+    if (this.options.downloadDefinitionUrl) {
+      return this.options.downloadDefinitionUrl;
+    }
+
     if (this.parser.specUrl) {
       return this.parser.specUrl;
     }
@@ -47,8 +51,8 @@ export class ApiInfoModel implements OpenAPIInfo {
   }
 
   private getDownloadFileName(): string | undefined {
-    if (!this.parser.specUrl) {
-      return this.options.downloadFileName;
+    if (!this.parser.specUrl && !this.options.downloadDefinitionUrl) {
+      return 'openapi.json';
     }
     return undefined;
   }