diff --git a/README.md b/README.md
index f8db285f..f33ed231 100644
--- a/README.md
+++ b/README.md
@@ -212,6 +212,7 @@ 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.
 * `downloadDefinitionUrl` - If the 'Download' button is visible in the API reference documentation (hideDownloadButton=false), the URL configured here will open when that button is selected. Provide it as an absolute URL with the full URI scheme.
 * `hideHostname` - if set, the protocol and hostname is not shown in the operation definition.
 * `hideLoading` - do not show loading animation. Useful for small docs.
diff --git a/src/components/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap b/src/components/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap
index 2f746e24..25f2f564 100644
--- a/src/components/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap
+++ b/src/components/__tests__/__snapshots__/DiscriminatorDropdown.test.tsx.snap
@@ -75,6 +75,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
                     "allowedMdComponents": Object {},
                     "disableSearch": false,
                     "downloadDefinitionUrl": undefined,
+                    "downloadFileName": undefined,
                     "enumSkipQuotes": false,
                     "expandDefaultServerVariables": false,
                     "expandResponses": Object {},
@@ -326,6 +327,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
                     "allowedMdComponents": Object {},
                     "disableSearch": false,
                     "downloadDefinitionUrl": undefined,
+                    "downloadFileName": undefined,
                     "enumSkipQuotes": false,
                     "expandDefaultServerVariables": false,
                     "expandResponses": Object {},
@@ -553,6 +555,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
               "allowedMdComponents": Object {},
               "disableSearch": false,
               "downloadDefinitionUrl": undefined,
+              "downloadFileName": undefined,
               "enumSkipQuotes": false,
               "expandDefaultServerVariables": false,
               "expandResponses": Object {},
@@ -845,6 +848,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
                     "allowedMdComponents": Object {},
                     "disableSearch": false,
                     "downloadDefinitionUrl": undefined,
+                    "downloadFileName": undefined,
                     "enumSkipQuotes": false,
                     "expandDefaultServerVariables": false,
                     "expandResponses": Object {},
@@ -1096,6 +1100,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
                     "allowedMdComponents": Object {},
                     "disableSearch": false,
                     "downloadDefinitionUrl": undefined,
+                    "downloadFileName": undefined,
                     "enumSkipQuotes": false,
                     "expandDefaultServerVariables": false,
                     "expandResponses": Object {},
@@ -1323,6 +1328,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
               "allowedMdComponents": Object {},
               "disableSearch": false,
               "downloadDefinitionUrl": undefined,
+              "downloadFileName": undefined,
               "enumSkipQuotes": false,
               "expandDefaultServerVariables": false,
               "expandResponses": Object {},
@@ -1573,6 +1579,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
           "allowedMdComponents": Object {},
           "disableSearch": false,
           "downloadDefinitionUrl": undefined,
+          "downloadFileName": undefined,
           "enumSkipQuotes": false,
           "expandDefaultServerVariables": false,
           "expandResponses": Object {},
@@ -1862,6 +1869,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
               "allowedMdComponents": Object {},
               "disableSearch": false,
               "downloadDefinitionUrl": undefined,
+              "downloadFileName": undefined,
               "enumSkipQuotes": false,
               "expandDefaultServerVariables": false,
               "expandResponses": Object {},
@@ -2113,6 +2121,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
               "allowedMdComponents": Object {},
               "disableSearch": false,
               "downloadDefinitionUrl": undefined,
+              "downloadFileName": undefined,
               "enumSkipQuotes": false,
               "expandDefaultServerVariables": false,
               "expandResponses": Object {},
@@ -2340,6 +2349,7 @@ exports[`Components SchemaView discriminator should correctly render SchemaView
         "allowedMdComponents": Object {},
         "disableSearch": false,
         "downloadDefinitionUrl": undefined,
+        "downloadFileName": undefined,
         "enumSkipQuotes": false,
         "expandDefaultServerVariables": false,
         "expandResponses": Object {},
diff --git a/src/services/RedocNormalizedOptions.ts b/src/services/RedocNormalizedOptions.ts
index 291c1adb..fdc5f922 100644
--- a/src/services/RedocNormalizedOptions.ts
+++ b/src/services/RedocNormalizedOptions.ts
@@ -27,6 +27,7 @@ export interface RedocRawOptions {
   untrustedSpec?: boolean | string;
   hideLoading?: boolean | string;
   hideDownloadButton?: boolean | string;
+  downloadFileName?: string;
   downloadDefinitionUrl?: string;
   disableSearch?: boolean | string;
   onlyRequiredInSamples?: boolean | string;
@@ -226,6 +227,7 @@ export class RedocNormalizedOptions {
   pathInMiddlePanel: boolean;
   untrustedSpec: boolean;
   hideDownloadButton: boolean;
+  downloadFileName?: string;
   downloadDefinitionUrl?: string;
   disableSearch: boolean;
   onlyRequiredInSamples: boolean;
@@ -293,6 +295,7 @@ export class RedocNormalizedOptions {
     this.pathInMiddlePanel = argValueToBoolean(raw.pathInMiddlePanel);
     this.untrustedSpec = argValueToBoolean(raw.untrustedSpec);
     this.hideDownloadButton = argValueToBoolean(raw.hideDownloadButton);
+    this.downloadFileName = raw.downloadFileName;
     this.downloadDefinitionUrl = raw.downloadDefinitionUrl;
     this.disableSearch = argValueToBoolean(raw.disableSearch);
     this.onlyRequiredInSamples = argValueToBoolean(raw.onlyRequiredInSamples);
diff --git a/src/services/__tests__/models/ApiInfo.test.ts b/src/services/__tests__/models/ApiInfo.test.ts
index a785f7c3..4a67139e 100644
--- a/src/services/__tests__/models/ApiInfo.test.ts
+++ b/src/services/__tests__/models/ApiInfo.test.ts
@@ -75,7 +75,38 @@ describe('Models', () => {
       expect(info.downloadFileName).toEqual('openapi.json');
     });
 
+    test('should correctly populate default download file is undefined when using specUrl', () => {
+      parser = new OpenAPIParser(
+        {
+          openapi: '3.0.0',
+          info: {
+            description: 'Test description',
+          },
+        } as any,
+        '/demo/openapi.yaml',
+        opts,
+      );
+
+      const info = new ApiInfoModel(parser);
+      expect(info.downloadFileName).toEqual(undefined);
+    });
+
     test('should correctly populate download file name', () => {
+      parser.spec = {
+        info: {
+          description: 'Test description',
+        },
+      } as any;
+
+      const opts = new RedocNormalizedOptions({
+        downloadFileName: 'test.yaml',
+      });
+
+      const info = new ApiInfoModel(parser, opts);
+      expect(info.downloadFileName).toEqual('test.yaml');
+    });
+
+    test('should correctly populate download link', () => {
       parser.spec = {
         openapi: '3.0.0',
         info: {
@@ -87,7 +118,24 @@ describe('Models', () => {
         downloadDefinitionUrl: 'https:test.com/filename.yaml',
       });
       const info = new ApiInfoModel(parser, opts);
-      expect(info.downloadFileName).toEqual(undefined);
+      expect(info.downloadLink).toEqual('https:test.com/filename.yaml');
+    });
+
+    test('should correctly populate download link and download file name', () => {
+      parser.spec = {
+        openapi: '3.0.0',
+        info: {
+          description: 'Test description',
+        },
+      } as any;
+
+      const opts = new RedocNormalizedOptions({
+        downloadDefinitionUrl: 'https:test.com/filename.yaml',
+        downloadFileName: 'test.yaml',
+      });
+      const info = new ApiInfoModel(parser, opts);
+      expect(info.downloadLink).toEqual('https:test.com/filename.yaml');
+      expect(info.downloadFileName).toEqual('test.yaml');
     });
   });
 });
diff --git a/src/services/models/ApiInfo.ts b/src/services/models/ApiInfo.ts
index b5d71802..0c4d91eb 100644
--- a/src/services/models/ApiInfo.ts
+++ b/src/services/models/ApiInfo.ts
@@ -52,8 +52,8 @@ export class ApiInfoModel implements OpenAPIInfo {
 
   private getDownloadFileName(): string | undefined {
     if (!this.parser.specUrl && !this.options.downloadDefinitionUrl) {
-      return 'openapi.json';
+      return this.options.downloadFileName || 'openapi.json';
     }
-    return undefined;
+    return this.options.downloadFileName;
   }
 }