diff --git a/src/normalizer.ts b/src/normalizer.ts
index 5549b59a..00b5fcff 100644
--- a/src/normalizer.ts
+++ b/src/normalizer.ts
@@ -222,6 +222,20 @@ rules.set('Transform const to singleton enum', schema => {
   }
 })
 
+rules.set('Transform nullable to null type', schema => {
+  if (schema.nullable !== true) {
+    return
+  }
+
+  delete schema.nullable
+
+  if (!schema.type) {
+    return
+  }
+
+  schema.type = [...[schema.type].flatMap(value => value), 'null']
+})
+
 export function normalize(
   rootSchema: LinkedJSONSchema,
   dereferencedPaths: DereferencedPaths,
diff --git a/test/__snapshots__/test/test.ts.md b/test/__snapshots__/test/test.ts.md
index d9e34739..2a4a9f98 100644
--- a/test/__snapshots__/test/test.ts.md
+++ b/test/__snapshots__/test/test.ts.md
@@ -1791,6 +1791,24 @@ Generated by [AVA](https://avajs.dev).
     }␊
     `
 
+## nullable.js
+
+> Expected output to match snapshot for e2e test: nullable.js
+
+    `/* eslint-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 Nullable {␊
+      foo?: string | null;␊
+      bar?: string | number | null;␊
+      [k: string]: unknown;␊
+    }␊
+    `
+
 ## oneOf.js
 
 > Expected output to match snapshot for e2e test: oneOf.js
diff --git a/test/__snapshots__/test/test.ts.snap b/test/__snapshots__/test/test.ts.snap
index cd1fb9ed..a424806a 100644
Binary files a/test/__snapshots__/test/test.ts.snap and b/test/__snapshots__/test/test.ts.snap differ
diff --git a/test/e2e/nullable.ts b/test/e2e/nullable.ts
new file mode 100644
index 00000000..2faa5e8f
--- /dev/null
+++ b/test/e2e/nullable.ts
@@ -0,0 +1,13 @@
+export const input = {
+  type: 'object',
+  properties: {
+    foo: {
+      type: 'string',
+      nullable: true
+    },
+    bar: {
+      type: ['string', 'number'],
+      nullable: true
+    }
+  }
+}
diff --git a/test/normalizer/nullableAddsNullToType.json b/test/normalizer/nullableAddsNullToType.json
new file mode 100644
index 00000000..a232921d
--- /dev/null
+++ b/test/normalizer/nullableAddsNullToType.json
@@ -0,0 +1,33 @@
+{
+  "name": "Nullable adds null to type",
+  "in": {
+    "$id": "a",
+    "type": "object",
+    "properties": {
+      "foo": {
+        "type": "string",
+        "nullable": true
+      },
+      "bar": {
+        "type": ["string", "number"],
+        "nullable": true
+      }
+    },
+    "required": [],
+    "additionalProperties": false
+  },
+  "out": {
+    "$id": "a",
+    "type": "object",
+    "properties": {
+      "foo": {
+        "type": ["string", "null"]
+      },
+      "bar": {
+        "type": ["string", "number", "null"]
+      }
+    },
+    "required": [],
+    "additionalProperties": false
+  }
+}