diff --git a/src/generator.ts b/src/generator.ts
index 7c2cda76..a11fcc7d 100644
--- a/src/generator.ts
+++ b/src/generator.ts
@@ -186,6 +186,7 @@ function generateInterface(
       .map(({ isRequired, keyName, ast }) => [isRequired, keyName, ast, generateType(ast, options)] as [boolean, string, AST, string])
       .map(([isRequired, keyName, ast, type]) =>
         (hasComment(ast) && !ast.standaloneName ? generateComment(ast.comment) + '\n' : '')
+        + (options.readOnlyProperties === true ? 'readonly ' : '')
         + escapeKeyName(keyName)
         + (isRequired ? '' : '?')
         + ': '
diff --git a/src/index.ts b/src/index.ts
index 11c2ff17..7d26d58e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -44,6 +44,10 @@ export interface Options {
    * [$RefParser](https://github.com/BigstickCarpet/json-schema-ref-parser) Options, used when resolving `$ref`s
    */
   $refOptions: $RefOptions
+  /**
+   * Generate interfaces with read-only (immutable) properties.
+   */
+  readOnlyProperties: boolean
 }
 
 export const DEFAULT_OPTIONS: Options = {
@@ -66,7 +70,8 @@ export const DEFAULT_OPTIONS: Options = {
     useTabs: false
   },
   unreachableDefinitions: false,
-  $refOptions: {}
+  $refOptions: {},
+  readOnlyProperties: false
 }
 
 export function compileFromFile(
diff --git a/test/__snapshots__/test/test.ts.md b/test/__snapshots__/test/test.ts.md
index f47d0f65..670a01a6 100644
--- a/test/__snapshots__/test/test.ts.md
+++ b/test/__snapshots__/test/test.ts.md
@@ -8775,3 +8775,20 @@ Generated by [AVA](https://ava.li).
       [k: string]: any;␊
     }␊
     `
+
+## readonlyProperties.js
+
+> Snapshot 1
+
+    `/* tslint:disable */␊
+    /**␊
+     * This file was automatically generated by json-schema-to-typescript.␊
+     * DO NOT MODIFY IT BY HAND. Instead, modify the source JSONSchema file,␊
+     * and run json-schema-to-typescript to regenerate this file.␊
+     */␊
+    ␊
+    export interface ReadOnlyExample {␊
+      readonly foo: string;␊
+      readonly bar: number;␊
+    }␊
+    `
diff --git a/test/__snapshots__/test/test.ts.snap b/test/__snapshots__/test/test.ts.snap
index 17d3b93f..1843e1ff 100644
Binary files a/test/__snapshots__/test/test.ts.snap and b/test/__snapshots__/test/test.ts.snap differ
diff --git a/test/e2e/readonlyProperties.ts b/test/e2e/readonlyProperties.ts
new file mode 100644
index 00000000..3c1f1aca
--- /dev/null
+++ b/test/e2e/readonlyProperties.ts
@@ -0,0 +1,20 @@
+import { Options } from '../../src/'
+
+export const input = {
+  title: 'ReadOnlyExample',
+  type: 'object',
+  properties: {
+    foo: {
+      type: 'string'
+    },
+    bar: {
+      type: 'number'
+    }
+  },
+  required: ['foo', 'bar'],
+  additionalProperties: false
+}
+
+export const options: Partial<Options> = {
+  readOnlyProperties: true
+}