diff --git a/doc/release-notes.md b/doc/release-notes.md
index 790c4159c..b53b02eff 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -1,50 +1,51 @@
 Bitcoin ABC version 0.20.6 is now available from:
 
   <https://download.bitcoinabc.org/0.20.6/>
 
 This release includes the following features and fixes:
  - `hdmasterkeyid` in `getwalletinfo` has been deprecated in favor of
    `hdseedid`.  `hdmasterkeyid` will be removed in V0.21.
  - `hdmasterkeyid` in `getaddressinfo` has been deprecated in favor of
    `hdseedid`.  `hdmasterkeyid` will be removed in V0.21.
  - The `inactivehdmaster` property in the `dumpwallet` output has been
    deprecated in favor of `inactivehdseed`. `inactivehdmaster` will be removed
    in V0.21.
+ - Building from source now requires python 3.5 or greater
 
 'label' and 'account' APIs for wallet
 -------------------------------------
 
 A new 'label' API has been introduced for the wallet. This is intended as a
 replacement for the deprecated 'account' API. The 'account' can continue to
 be used in v0.20 by starting bitcoind with the '-deprecatedrpc=accounts'
 argument, and will be fully removed in v0.21.
 
 The label RPC methods mirror the account functionality, with the following functional differences:
 
 - Labels can be set on any address, not just receiving addresses. This functionality was previously only available through the GUI.
 - Labels can be deleted by reassigning all addresses using the `setlabel` RPC method.
 - There isn't support for sending transactions _from_ a label, or for determining which label a transaction was sent from.
 - Labels do not have a balance.
 
 Here are the changes to RPC methods:
 
 | Deprecated Method       | New Method            | Notes       |
 | :---------------------- | :-------------------- | :-----------|
 | `getaccount`            | `getaddressinfo`      | `getaddressinfo` returns a json object with address information instead of just the name of the account as a string. |
 | `getaccountaddress`     | `getlabeladdress`     | `getlabeladdress` throws an error by default if the label does not already exist, but provides a `force` option for compatibility with existing applications. |
 | `getaddressesbyaccount` | `getaddressesbylabel` | `getaddressesbylabel` returns a json object with the addresses as keys, instead of a list of strings. |
 | `getreceivedbyaccount`  | `getreceivedbylabel`  | _no change in behavior_ |
 | `listaccounts`          | `listlabels`          | `listlabels` does not return a balance or accept `minconf` and `watchonly` arguments. |
 | `listreceivedbyaccount` | `listreceivedbylabel` | Both methods return new `label` fields, along with `account` fields for backward compatibility. |
 | `move`                  | n/a                   | _no replacement_ |
 | `sendfrom`              | n/a                   | _no replacement_ |
 | `setaccount`            | `setlabel`            | Both methods now: <ul><li>allow assigning labels to any address, instead of raising an error if the address is not receiving address.<li>delete the previous label associated with an address when the final address using that label is reassigned to a different label, instead of making an implicit `getaccountaddress` call to ensure the previous label still has a receiving address. |
 
 | Changed Method         | Notes   |
 | :--------------------- | :------ |
 | `addmultisigaddress`   | Renamed `account` named parameter to `label`. Still accepts `account` for backward compatibility if running with '-deprecatedrpc=accounts'. |
 | `getnewaddress`        | Renamed `account` named parameter to `label`. Still accepts `account` for backward compatibility. if running with '-deprecatedrpc=accounts' |
 | `listunspent`          | Returns new `label` fields. `account` field will be returned for backward compatibility if running with '-deprecatedrpc=accounts' |
 | `sendmany`             | The `account` named parameter has been renamed to `dummy`. If provided, the `dummy` parameter must be set to the empty string, unless running with the `-deprecatedrpc=accounts` argument (in which case functionality is unchanged). |
 | `listtransactions`     | The `account` named parameter has been renamed to `dummy`. If provided, the `dummy` parameter must be set to the string `*`, unless running with the `-deprecatedrpc=accounts` argument (in which case functionality is unchanged). |
 | `getbalance`           | `account`, `minconf` and `include_watchonly` parameters are deprecated, and can only be used if running with '-deprecatedrpc=accounts' |