diff --git a/README.md b/README.md
index 4571168..646ed45 100644
--- a/README.md
+++ b/README.md
@@ -118,6 +118,8 @@ This will read `values.yaml`, set draft version to `2020-12` and save outpout to
 
 ### Extended
 
+#### Multiple values files
+
 Merge multiple values files, set json-schema draft version explicitly and save output to `my.schema.json`:
 
 `values_1.yaml`
@@ -213,6 +215,8 @@ Output will be something like this:
 }
 ```
 
+#### Root JSON object properties
+
 Adding ID, title and description to the schema:
 
 `basic.yaml`
diff --git a/docs/README.md b/docs/README.md
index 4cb37d9..db5a791 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -39,6 +39,7 @@ The following annotations are supported:
     * [required](#required)
     * [patternProperties](#patternproperties)
     * [additionalProperties](#additionalproperties)
+    * [$id](#$id)
 * [Meta-Data Annotations](#meta-data-annotations)
     * [title and description](#title-and-description)
     * [default](#default)
@@ -417,6 +418,35 @@ image: # @schema additionalProperties: false
 }
 ```
 
+### $id
+
+String. [section 8.2.1](https://datatracker.ietf.org/doc/html/draft-bhutton-json-schema-00#section-8.2.1)
+
+```yaml
+image: # @schema $id: https://example.com/schema.json
+  repository: nginx
+  tag: latest
+  pullPolicy: Always
+```
+
+```json
+"image": {
+    "$id": "https://example.com/schema.json",
+    "properties": {
+        "pullPolicy": {
+            "type": "string"
+        },
+        "repository": {
+            "type": "string"
+        },
+        "tag": {
+            "type": "string"
+        }
+    },
+    "type": "object"
+}
+```
+
 ## Meta-Data Annotations
 
 ### title and description
@@ -427,9 +457,6 @@ String. [section 9.1](https://json-schema.org/draft/2020-12/json-schema-validati
 fullnameOverride: bar # @schema title: My title ; description: My description
 ```
 
-```json
-```
-
 ```json
 "fullnameOverride": {
     "title": "My title",