diff --git a/clients/horizonclient/CHANGELOG.md b/clients/horizonclient/CHANGELOG.md
index d7e0af4908..453d4f82de 100644
--- a/clients/horizonclient/CHANGELOG.md
+++ b/clients/horizonclient/CHANGELOG.md
@@ -3,11 +3,27 @@
 All notable changes to this project will be documented in this
 file.  This project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
-
+## [v4.0.0](https://github.com/stellar/go/releases/tag/horizonclient-v4.0.0) - 2020-09-29
+
+Added new client methods and effects supporting [Protocol 14](https://github.com/stellar/go/issues/3035).
+
+* New client methods
+  * `ClaimableBalances(req ClaimableBalanceRequest)` - returns details about available claimable balances, possibly filtered to a specific sponsor or other parameters.
+  * `ClaimableBalance(balanceID string)` - returns details about a *specific*, unique claimable balance.
+* New effects:
+  * `ClaimableBalance{Created,Updated,Removed}`
+  * `ClaimabeBalanceSponsorship{Created,Updated,Removed}`
+  * `AccountSposnorship{Created,Updated,Removed}`
+  * `TrustlineSponsorship{Created,Updated,Removed}`
+  * `Data{Created,Updated,Removed}`
+  * `DataSponsorship{Created,Updated,Removed}`
+  * `SignerSponsorship{Created,Updated,Removed}`
 * Remove JSON variant of `GET /metrics`, both in the server and client code. It's using Prometheus format by default now.
 * Add `NextAccountsPage`.
 * Fix `Fund` function that consistently errored.
+
+### Breaking changes
+
 * Dropped support for Go 1.13.
 
 ## [v3.0.0](https://github.com/stellar/go/releases/tag/horizonclient-v3.0.0) - 2020-04-28
diff --git a/txnbuild/CHANGELOG.md b/txnbuild/CHANGELOG.md
index fc9b2f1eb1..727f673b10 100644
--- a/txnbuild/CHANGELOG.md
+++ b/txnbuild/CHANGELOG.md
@@ -3,18 +3,17 @@
 All notable changes to this project will be documented in this
 file.  This project adheres to [Semantic Versioning](http://semver.org/).
 
-## Unreleased
-Updated to support [Protocol 14](https://github.com/stellar/go/issues/3035) operations. There are now ways to:
+## [v4.0.0](https://github.com/stellar/go/releases/tag/horizonclient-v4.0.0) - 2020-09-29
+
+Added support for the new operations in [Protocol 14](https://github.com/stellar/go/issues/3035). Now it is possible to:
 
 * Create and claim claimable balance operations (see [CAP-23](https://github.com/stellar/stellar-protocol/blob/master/core/cap-0023.md)) with the `[Create|Claim]ClaimableBalance` structures and their associated helpers
 * Begin/end sponsoring future reserves for other accounts (see [CAP-33](https://github.com/stellar/stellar-protocol/blob/master/core/cap-0033.md)) with the `[Begin|End]SponsoringFutureReserves` operations
-* Revoke sponsorships of various objects with the `RevokeSponsorship` operation
-* Dropped support for Go 1.13.
-
-## [v4.0.0](https://github.com/stellar/go/releases/tag/horizonclient-v4.0.0) - 2020-08-31
+* Revoke sponsorships of various objects with the `RevokeSponsorship` operation (see [CAP-33](https://github.com/stellar/stellar-protocol/blob/master/core/cap-0033.md)).
 
 ### Breaking changes
 
+* Dropped support for Go 1.13.
 * Replace `BuildChallengeTx()`'s `anchorName string` parameter with `homeDomain string`
 * Add `homeDomain string` parameter to `ReadChallengeTx()`, `VerifyChallengeTxThreshold()`, and `VerifyChallengeTxSigners()`