diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67f25330..12cdaca0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.10.3](https://github.com/agentclientprotocol/agent-client-protocol/compare/v0.10.2...v0.10.3) - 2025-12-15
+
+### Added
+
+- *(unstable)* add SessionInfoUpdate to SessionUpdate enum ([#334](https://github.com/agentclientprotocol/agent-client-protocol/pull/334))
+- *(rust-only)* Introduce MaybeUndefined type to allow for distinguishing between null and undefined ([#337](https://github.com/agentclientprotocol/agent-client-protocol/pull/337))
+
 ## [0.10.2](https://github.com/agentclientprotocol/agent-client-protocol/compare/v0.10.1...v0.10.2) - 2025-12-11
 
 ### Added
diff --git a/Cargo.lock b/Cargo.lock
index c7b1a329..db7fecef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "agent-client-protocol-schema"
-version = "0.10.2"
+version = "0.10.3"
 dependencies = [
  "anyhow",
  "derive_more",
diff --git a/Cargo.toml b/Cargo.toml
index 70dd25c5..5aa2b92f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "agent-client-protocol-schema"
 authors = ["Zed <hi@zed.dev>"]
-version = "0.10.2"
+version = "0.10.3"
 edition = "2024"
 license = "Apache-2.0"
 description = "A protocol for standardizing communication between code editors and AI coding agents"