diff --git a/CHANGELOG.md b/CHANGELOG.md
index e6570cf6..bcae24dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,20 @@
 # Changelog
 
+## [0.13.5](https://github.com/agentclientprotocol/agent-client-protocol/compare/v0.13.4...v0.13.5) - 2026-06-01
+
+### Added
+
+- *(schema)* Experiment annotating lenient deserialize opportunities ([#1328](https://github.com/agentclientprotocol/agent-client-protocol/pull/1328))
+- Stabilize additionalDirectories for sessions ([#1327](https://github.com/agentclientprotocol/agent-client-protocol/pull/1327))
+- *(unstable)* Remove unstable session model API ([#1325](https://github.com/agentclientprotocol/agent-client-protocol/pull/1325))
+- *(unstable-v2)* Remove dedicated session modes and models apis from v2 ([#1324](https://github.com/agentclientprotocol/agent-client-protocol/pull/1324))
+- *(unstable)* Add v2 enum extension RFD and fallbacks ([#1304](https://github.com/agentclientprotocol/agent-client-protocol/pull/1304))
+
+### Other
+
+- Move existing protocol docs to v1 ([#1326](https://github.com/agentclientprotocol/agent-client-protocol/pull/1326))
+- Add some draft v2 protocol docs and schema ([#1306](https://github.com/agentclientprotocol/agent-client-protocol/pull/1306))
+
 ## [0.13.4](https://github.com/agentclientprotocol/agent-client-protocol/compare/v0.13.3...v0.13.4) - 2026-05-27
 
 ### Added
diff --git a/Cargo.lock b/Cargo.lock
index 04285b23..187166a4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "agent-client-protocol-schema"
-version = "0.13.4"
+version = "0.13.5"
 dependencies = [
  "anyhow",
  "derive_more",
diff --git a/Cargo.toml b/Cargo.toml
index 48b05737..5addfbf2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "agent-client-protocol-schema"
 authors = ["Zed <hi@zed.dev>"]
-version = "0.13.4"
+version = "0.13.5"
 edition = "2024"
 license = "Apache-2.0"
 description = "A protocol for standardizing communication between code editors and AI coding agents"