diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1d085e5f..9d1ac447 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.11.8](https://github.com/agentclientprotocol/agent-client-protocol/compare/v0.11.7...v0.11.8) - 2026-04-17
+
+### Fixed
+
+- *(rpc)* preserve '_' prefix for extension methods and reject empty ext ([#883](https://github.com/agentclientprotocol/agent-client-protocol/pull/883))
+
 ## [0.11.7](https://github.com/agentclientprotocol/agent-client-protocol/compare/v0.11.6...v0.11.7) - 2026-04-15
 
 ### Added
diff --git a/Cargo.lock b/Cargo.lock
index 524c4c07..33b9f0a6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "agent-client-protocol-schema"
-version = "0.11.7"
+version = "0.11.8"
 dependencies = [
  "anyhow",
  "derive_more",
diff --git a/Cargo.toml b/Cargo.toml
index 7635971e..f410c861 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "agent-client-protocol-schema"
 authors = ["Zed <hi@zed.dev>"]
-version = "0.11.7"
+version = "0.11.8"
 edition = "2024"
 license = "Apache-2.0"
 description = "A protocol for standardizing communication between code editors and AI coding agents"