diff --git a/packages/cmc/README.md b/packages/cmc/README.md
index e06541f7..d1bc2d57 100644
--- a/packages/cmc/README.md
+++ b/packages/cmc/README.md
@@ -63,6 +63,7 @@ const rate = await getIcpToCyclesConversionRate();
 - [getIcpToCyclesConversionRate](#gear-geticptocyclesconversionrate)
 - [notifyCreateCanister](#gear-notifycreatecanister)
 - [notifyTopUp](#gear-notifytopup)
+- [getDefaultSubnets](#gear-getdefaultsubnets)
 
 ##### :gear: create
 
@@ -104,4 +105,21 @@ It returns the new Cycles of the canister.
 
 [:link: Source](https://github.com/dfinity/ic-js/tree/main/packages/cmc/src/cmc.canister.ts#L76)
 
+##### :gear: getDefaultSubnets
+
+This function calls the `get_default_subnets` method of the CMC canister, which returns a list of
+default subnets as `Principal` objects. It can be called as query or update.
+
+| Method              | Type                                                    |
+| ------------------- | ------------------------------------------------------- |
+| `getDefaultSubnets` | `({ certified }?: QueryParams) => Promise<Principal[]>` |
+
+Parameters:
+
+- `params`: - The query parameters for the call.
+- `params.certified`: - Determines whether the response should be certified
+  (default: non-certified if not specified).
+
+[:link: Source](https://github.com/dfinity/ic-js/tree/main/packages/cmc/src/cmc.canister.ts#L101)
+
 <!-- TSDOC_END -->