diff --git a/Cargo.lock b/Cargo.lock
index 01c95d1..8a26068 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -21,12 +21,13 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol"
-version = "3.5.0"
+version = "5.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9bbe69c878aef64a3d92041e256e75acdb1bf2ea8e55ef3313e69dbb2f5bd75a"
+checksum = "c60cfd8cddbb23d9e30f51dca5316b4cea769ba55900db1fa8951dca4f28d02d"
 dependencies = [
  "agent-client-protocol-derive",
  "agent-client-protocol-schema",
+ "anyhow",
  "futures",
  "futures-concurrency",
  "rustc-hash",
@@ -38,9 +39,9 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-derive"
-version = "3.5.0"
+version = "5.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25b7ae92f0d1ba46ca61e7e03d4a9758e877d100b783aa1c62b140d5a9d59fb2"
+checksum = "b296716e42d77d38aef7f645cbe0765287b0e0a84722cb9f8ac39e6cdcecdb2a"
 dependencies = [
  "quote",
  "syn 3.0.9",
@@ -48,9 +49,9 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-schema"
-version = "1.12.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "430e900fdb40a811c1a3e0d85b1134e485d96699f8b90889a15c1da6a0b26c3f"
+checksum = "e20d2c4af6eb08f6a4f562520bdd939a4af803255fec461dd523638c22f5b265"
 dependencies = [
  "anyhow",
  "derive_more",
diff --git a/Cargo.toml b/Cargo.toml
index 44dd8fa..3cdc875 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -127,7 +127,7 @@ aws-smithy-eventstream = "0.61"
 aws-smithy-types = "1"
 bytes = "1"
 # Agent Client Protocol (Zed) — editor ↔ agent standard, official Rust SDK
-agent-client-protocol = "3"
+agent-client-protocol = "5"
 async-trait = "0.1"
 webbrowser = "1"
 urlencoding = "2"