diff --git a/AblyLiveObjects.xcworkspace/xcshareddata/swiftpm/Package.resolved b/AblyLiveObjects.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 550ef47..a45cc68 100644
--- a/AblyLiveObjects.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/AblyLiveObjects.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -1,12 +1,13 @@
 {
-  "originHash" : "95afbce8759332da020c1fee21274fc36d3a4d553a84ba74cc9c6b6a362b92af",
+  "originHash" : "882ea3086372221060f5fc4b93d0254adddc2a879699f35a91adee80d3ba15ce",
   "pins" : [
     {
       "identity" : "ably-cocoa",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/ably/ably-cocoa.git",
       "state" : {
-        "revision" : "5e4cca89749ec051a57c5758412c080f049fcf42"
+        "revision" : "83bb5366b09408723446d8ba8a146938eeba829e",
+        "version" : "1.2.59"
       }
     },
     {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8570c88..c51b748 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,31 @@
 # Change Log
 
+## [0.4.0](https://github.com/ably/ably-liveobjects-swift-plugin/tree/0.4.0)
+
+### Operations are now applied on acknowledgement
+
+When you call a mutation method (e.g. `map.set()`), the SDK now applies the effects of this operation to the local LiveObjects data as soon as it receives the server's acknowledgement of the operation. This is an improvement over earlier versions, in which the SDK did not apply such an operation until receiving the operation's echo.
+
+Concretely, this means that in the following example, `fetchedValue` is now guaranteed to be `myValue`:
+
+```swift
+try await map.set(key: "myKey", value: "myValue")
+let fetchedValue = try map.get(key: "myKey")
+```
+
+### Other changes
+
+These changes do not affect the plugin's public API.
+
+- Buffer operations whilst `SYNCING` per updated RTO8a (https://github.com/ably/ably-liveobjects-swift-plugin/pull/109)
+- Fix events emitted upon sync (https://github.com/ably/ably-liveobjects-swift-plugin/pull/111)
+- Support the protocol v6 `ObjectMessage` structure (https://github.com/ably/ably-liveobjects-swift-plugin/pull/114)
+- Implement new rules for discarding ops buffered during sync (https://github.com/ably/ably-liveobjects-swift-plugin/pull/121)
+- Partial object sync (https://github.com/ably/ably-liveobjects-swift-plugin/pull/117)
+- Implement `MAP_CLEAR` operation (https://github.com/ably/ably-liveobjects-swift-plugin/pull/122)
+
+**Full Changelog**: https://github.com/ably/ably-liveobjects-swift-plugin/compare/0.3.0...0.4.0
+
 ## [0.3.0](https://github.com/ably/ably-liveobjects-swift-plugin/tree/0.3.0)
 
 ## What's Changed
diff --git a/Package.resolved b/Package.resolved
index 80f72e8..95a9490 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -1,12 +1,13 @@
 {
-  "originHash" : "a99712beebe11b3d7800b25f4f287f116646da3fd909c3fe89a79fb9ec598335",
+  "originHash" : "263b1ea0fd786ff1456ebaef26e6b6baa0f018c0154cf2929eaa91abb0b54061",
   "pins" : [
     {
       "identity" : "ably-cocoa",
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/ably/ably-cocoa.git",
       "state" : {
-        "revision" : "5e4cca89749ec051a57c5758412c080f049fcf42"
+        "revision" : "83bb5366b09408723446d8ba8a146938eeba829e",
+        "version" : "1.2.59"
       }
     },
     {
diff --git a/Package.swift b/Package.swift
index 886488b..982af18 100644
--- a/Package.swift
+++ b/Package.swift
@@ -18,10 +18,9 @@ let package = Package(
         ),
     ],
     dependencies: [
-        // TODO: Unpin before release
         .package(
             url: "https://github.com/ably/ably-cocoa.git",
-            revision: "5e4cca89749ec051a57c5758412c080f049fcf42",
+            from: "1.2.59",
         ),
         .package(
             url: "https://github.com/ably/ably-cocoa-plugin-support",