diff --git a/docs/reference-guides/theme-json-reference/theme-json-living.md b/docs/reference-guides/theme-json-reference/theme-json-living.md
index b526486d95242..164cacfd47612 100644
--- a/docs/reference-guides/theme-json-reference/theme-json-living.md
+++ b/docs/reference-guides/theme-json-reference/theme-json-living.md
@@ -59,6 +59,7 @@ Settings related to shadows.
 
 | Property  | Type   | Default | Props  |
 | ---       | ---    | ---    |---   |
+| defaultPresets | boolean | true |  |
 | presets | array |  | name, shadow, slug |
 
 ---
diff --git a/schemas/json/theme.json b/schemas/json/theme.json
index 19ca0097a10f3..3cebf7187565f 100644
--- a/schemas/json/theme.json
+++ b/schemas/json/theme.json
@@ -74,6 +74,11 @@
 					"description": "Settings related to shadows.",
 					"type": "object",
 					"properties": {
+						"defaultPresets": {
+							"description": "Allow users to choose shadows from the default shadow presets.",
+							"type": "boolean",
+							"default": true
+						},
 						"presets": {
 							"description": "Shadow presets for the shadow picker.\nGenerates a single custom property (`--wp--preset--shadow--{slug}`) per preset value.",
 							"type": "array",
@@ -97,7 +102,8 @@
 								"additionalProperties": false
 							}
 						}
-					}
+					},
+					"additionalProperties": false
 				}
 			}
 		},