diff --git a/packages/nx/schemas/nx-schema.json b/packages/nx/schemas/nx-schema.json
index 49a15ae93a79b..23998fc4d10fe 100644
--- a/packages/nx/schemas/nx-schema.json
+++ b/packages/nx/schemas/nx-schema.json
@@ -506,6 +506,11 @@
             "type": "object"
           }
         },
+        "parallelism": {
+          "type": "boolean",
+          "default": true,
+          "description": "Whether this target can be run in parallel with other tasks"
+        },
         "inputs": {
           "$ref": "#/definitions/inputs"
         },