diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9c9612e..5c49db0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ All notable changes to the Apify Go client are documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.3] - 2026-06-30
+
+### Changed
+- Bumped `API_SPEC_VERSION` to `v2-2026-06-30T091455Z`.
+- Bumped `CLIENT_VERSION` to `0.4.3`.
+- Synced the `API_SPEC_VERSION` reference in the `README.md` "Versioning" section to match `version.go`.
+
+### Documentation
+- `docs/actors.md`: document the nil-`waitSecs` behaviour of `Call`.
+
 ## [0.4.2] - 2026-06-29
 
 Synchronized with Apify OpenAPI specification `v2-2026-06-29T142258Z` (previously
diff --git a/README.md b/README.md
index ddc1e51..4816521 100644
--- a/README.md
+++ b/README.md
@@ -179,7 +179,7 @@ func main() {
 
 - `apify.CLIENT_VERSION` — the semantic version of this library.
 - `apify.API_SPEC_VERSION` — the Apify OpenAPI spec version this client was built against
-  (`v2-2026-06-29T142258Z`).
+  (`v2-2026-06-30T091455Z`).
 
 ### Releasing
 
diff --git a/docs/actors.md b/docs/actors.md
index 37675c9..a133b47 100644
--- a/docs/actors.md
+++ b/docs/actors.md
@@ -80,7 +80,7 @@ The `Actor` value returned by `Get`/`Create`/`Update` and listed by `List`:
 | `Update(ctx, newFields any) (Actor, error)` | Update the Actor. |
 | `Delete(ctx) error` | Delete the Actor. |
 | `Start(ctx, input any, ActorStartOptions) (ActorRun, error)` | Start a run, return immediately. |
-| `Call(ctx, input any, ActorStartOptions, waitSecs *int64) (ActorRun, error)` | Start and wait for the run to finish. |
+| `Call(ctx, input any, ActorStartOptions, waitSecs *int64) (ActorRun, error)` | Start and wait for the run to finish. `waitSecs` bounds the client-side wait; pass `nil` to wait indefinitely (until the run reaches a terminal state). |
 | `Build(ctx, versionNumber string, ActorBuildOptions) (Build, error)` | Build a version. |
 | `DefaultBuild(ctx, waitForFinish *int64) (*BuildClient, error)` | Resolve the default build. |
 | `ValidateInput(ctx, input any) (json.RawMessage, error)` | Validate input against the `latest` build's schema. |
diff --git a/version.go b/version.go
index 710f3d1..3dc6cfe 100644
--- a/version.go
+++ b/version.go
@@ -4,10 +4,10 @@ package apify
 //
 // It follows Semantic Versioning (https://semver.org/). Changes to the public
 // interface (other than additive ones) are considered breaking changes.
-const CLIENT_VERSION = "0.4.2"
+const CLIENT_VERSION = "0.4.3"
 
 // API_SPEC_VERSION is the version of the Apify OpenAPI specification that this
 // client was generated and verified against.
 //
 // It corresponds to the `info.version` field of the Apify OpenAPI document.
-const API_SPEC_VERSION = "v2-2026-06-29T142258Z"
+const API_SPEC_VERSION = "v2-2026-06-30T091455Z"