diff --git a/Cargo.lock b/Cargo.lock
index 48853d14..d6afe221 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,7 +4,7 @@ version = 4
 
 [[package]]
 name = "agent-client-protocol"
-version = "2.2.0"
+version = "3.0.0"
 dependencies = [
  "agent-client-protocol-derive",
  "agent-client-protocol-schema",
@@ -31,7 +31,7 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-conductor"
-version = "2.2.0"
+version = "3.0.0"
 dependencies = [
  "agent-client-protocol",
  "agent-client-protocol-polyfill",
@@ -61,7 +61,7 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-cookbook"
-version = "2.2.0"
+version = "3.0.0"
 dependencies = [
  "agent-client-protocol",
  "agent-client-protocol-rmcp",
@@ -74,7 +74,7 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-derive"
-version = "2.2.0"
+version = "3.0.0"
 dependencies = [
  "quote",
  "syn 3.0.6",
@@ -82,7 +82,7 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-http"
-version = "2.2.0"
+version = "3.0.0"
 dependencies = [
  "agent-client-protocol",
  "agent-client-protocol-test",
@@ -105,7 +105,7 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-polyfill"
-version = "2.2.0"
+version = "3.0.0"
 dependencies = [
  "agent-client-protocol",
  "async-stream",
@@ -122,7 +122,7 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-rmcp"
-version = "3.1.1"
+version = "4.0.0"
 dependencies = [
  "agent-client-protocol",
  "futures",
@@ -173,7 +173,7 @@ dependencies = [
 
 [[package]]
 name = "agent-client-protocol-trace-viewer"
-version = "2.2.0"
+version = "3.0.0"
 dependencies = [
  "anyhow",
  "axum",
@@ -1626,9 +1626,9 @@ dependencies = [
 
 [[package]]
 name = "js-sys"
-version = "0.3.105"
+version = "0.3.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce57d20d1ea864ce2ac172ab472d409214f4fd359f0b2a2775abdf522e2af99e"
+checksum = "7883d941dae510fb2d978fc3fe018c71c9e2892fd38854de3e8b92c2e5ad9cc5"
 dependencies = [
  "cfg-if",
  "futures-util",
@@ -2484,9 +2484,9 @@ dependencies = [
 
 [[package]]
 name = "serde_with"
-version = "3.23.0"
+version = "3.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "935177bb8c0cd8ca1a4e6d1a2ac8988bea69cab4f9d3a31311e012ad27868ea4"
+checksum = "df9adc193c780ef8f159aee8b61e2d5801aaa555e6eb0947fe45530ec506296f"
 dependencies = [
  "base64 0.23.1",
  "bs58",
@@ -2505,9 +2505,9 @@ dependencies = [
 
 [[package]]
 name = "serde_with_macros"
-version = "3.23.0"
+version = "3.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d607aa01a3cb0ad757d6fd216136910db3c97b102fe686585689615a02dbcdc"
+checksum = "3e17bbc68e28663bbbb90df47e058aa7eda4fb445b89fe70457bb94fbccf6e49"
 dependencies = [
  "darling",
  "proc-macro2",
@@ -2813,9 +2813,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-rustls"
-version = "0.26.5"
+version = "0.26.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0c85f2c3ef0b1cd58b36682f4b17aaa995f0e5db534d85692b4903abce21f67"
+checksum = "c9cc2678c2cdd569ef8215e2afd7954ada2ae20b4fdd2c5fe6139a3b02d105db"
 dependencies = [
  "rustls",
  "tokio",
@@ -3157,9 +3157,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.128"
+version = "0.2.129"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aecb87a33d3b0c5e3b7aa46336eaf486cffafbd281b195e4c8b80d50df2351bf"
+checksum = "9bb54f33acc68fd454578d9820b0bde1a1a3d17aa17bb7b6595806d02886d409"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -3170,19 +3170,20 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.78"
+version = "0.4.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ef4c5d3d2cdf5c54f4231181768f5510842e350db025faf1f7163b1030ed928"
+checksum = "3cbab34de2d982e9b48e18d216d04c4a6f641066ff19ffb699980f591ee3610e"
 dependencies = [
  "js-sys",
+ "tokio",
  "wasm-bindgen",
 ]
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.128"
+version = "0.2.129"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a690d511e3c1a8b3a55e33511e3c2c00c78415cd23650f32b808627f5696b9ed"
+checksum = "2e29d0c35b16e224a7eeb5cd2d25e3e1968fbd65604117b44d3b789d00ee8535"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -3190,9 +3191,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.128"
+version = "0.2.129"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "411e4887f0071ef2d2164a9d5fdf2d20efbef78fccd3a78b0c10a1dc5295e48a"
+checksum = "6f501a8bc3719dba86ef8ae4728879c08001bea749eb1333ac5b91e040e2a6b7"
 dependencies = [
  "bumpalo",
  "proc-macro2",
@@ -3203,9 +3204,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.128"
+version = "0.2.129"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81941cd78d0c92026c33e5e01312845a4cb1e9af3407f9134b100dd03144103e"
+checksum = "23f0c9c52aa7cd7d77769a4cfe2a9adb1b331f489a41d912ce14513d5ab995c6"
 dependencies = [
  "unicode-ident",
 ]
@@ -3225,9 +3226,9 @@ dependencies = [
 
 [[package]]
 name = "web-sys"
-version = "0.3.105"
+version = "0.3.106"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fbddc4a036f00ec4f18c83445bd3115cb306a91da554919a099d9222fe4a7f8"
+checksum = "88261b9deccee56594c11a3460c462c41f58d148598fe70ad77070126a68aba4"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
diff --git a/Cargo.toml b/Cargo.toml
index e62bf28d..3b1a6dfa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,12 +26,12 @@ repository = "https://github.com/agentclientprotocol/rust-sdk"
 
 [workspace.dependencies]
 # Internal crates
-agent-client-protocol = { path = "src/agent-client-protocol", version = "2.2.0" }
-agent-client-protocol-derive = { path = "src/agent-client-protocol-derive", version = "2.2.0" }
-agent-client-protocol-polyfill = { path = "src/agent-client-protocol-polyfill", version = "2.2.0" }
-agent-client-protocol-rmcp = { path = "src/agent-client-protocol-rmcp", version = "3.1.1" }
+agent-client-protocol = { path = "src/agent-client-protocol", version = "3.0.0" }
+agent-client-protocol-derive = { path = "src/agent-client-protocol-derive", version = "3.0.0" }
+agent-client-protocol-polyfill = { path = "src/agent-client-protocol-polyfill", version = "3.0.0" }
+agent-client-protocol-rmcp = { path = "src/agent-client-protocol-rmcp", version = "4.0.0" }
 agent-client-protocol-test = { path = "src/agent-client-protocol-test" }
-agent-client-protocol-trace-viewer = { path = "src/agent-client-protocol-trace-viewer", version = "2.2.0" }
+agent-client-protocol-trace-viewer = { path = "src/agent-client-protocol-trace-viewer", version = "3.0.0" }
 yopo = { package = "agent-client-protocol-yopo", path = "src/yopo" }
 
 # Protocol
diff --git a/src/agent-client-protocol-conductor/CHANGELOG.md b/src/agent-client-protocol-conductor/CHANGELOG.md
index 43d44e40..1bc2448f 100644
--- a/src/agent-client-protocol-conductor/CHANGELOG.md
+++ b/src/agent-client-protocol-conductor/CHANGELOG.md
@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.0.0](https://github.com/agentclientprotocol/rust-sdk/compare/agent-client-protocol-conductor-v2.2.0...agent-client-protocol-conductor-v3.0.0) - 2026-09-28
+
+### Added
+
+- *(deps)* bump the minor group with 14 updates ([#381](https://github.com/agentclientprotocol/rust-sdk/pull/381))
+- *(rmcp)* [**breaking**] upgrade integration to rmcp 3.4
+
 ## [2.2.0](https://github.com/agentclientprotocol/rust-sdk/compare/agent-client-protocol-conductor-v2.1.0...agent-client-protocol-conductor-v2.2.0) - 2026-09-18
 
 ### Other
diff --git a/src/agent-client-protocol-conductor/Cargo.toml b/src/agent-client-protocol-conductor/Cargo.toml
index 7b49d9a4..08ae9489 100644
--- a/src/agent-client-protocol-conductor/Cargo.toml
+++ b/src/agent-client-protocol-conductor/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-conductor"
-version = "2.2.0"
+version = "3.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true
diff --git a/src/agent-client-protocol-cookbook/CHANGELOG.md b/src/agent-client-protocol-cookbook/CHANGELOG.md
index 91e80c8e..5a0e44a6 100644
--- a/src/agent-client-protocol-cookbook/CHANGELOG.md
+++ b/src/agent-client-protocol-cookbook/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.0.0](https://github.com/agentclientprotocol/rust-sdk/compare/agent-client-protocol-cookbook-v2.2.0...agent-client-protocol-cookbook-v3.0.0) - 2026-09-28
+
+### Added
+
+- *(rmcp)* [**breaking**] upgrade integration to rmcp 3.4
+
 ## [2.2.0](https://github.com/agentclientprotocol/rust-sdk/compare/agent-client-protocol-cookbook-v2.1.0...agent-client-protocol-cookbook-v2.2.0) - 2026-09-18
 
 ### Other
diff --git a/src/agent-client-protocol-cookbook/Cargo.toml b/src/agent-client-protocol-cookbook/Cargo.toml
index 80f12a81..6f91eb3f 100644
--- a/src/agent-client-protocol-cookbook/Cargo.toml
+++ b/src/agent-client-protocol-cookbook/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-cookbook"
-version = "2.2.0"
+version = "3.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true
diff --git a/src/agent-client-protocol-derive/Cargo.toml b/src/agent-client-protocol-derive/Cargo.toml
index cbfd273d..0b27025b 100644
--- a/src/agent-client-protocol-derive/Cargo.toml
+++ b/src/agent-client-protocol-derive/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-derive"
-version = "2.2.0"
+version = "3.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true
diff --git a/src/agent-client-protocol-http/Cargo.toml b/src/agent-client-protocol-http/Cargo.toml
index 71bfeffd..8a538070 100644
--- a/src/agent-client-protocol-http/Cargo.toml
+++ b/src/agent-client-protocol-http/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-http"
-version = "2.2.0"
+version = "3.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true
diff --git a/src/agent-client-protocol-polyfill/Cargo.toml b/src/agent-client-protocol-polyfill/Cargo.toml
index 6c678b4f..f19d9ca7 100644
--- a/src/agent-client-protocol-polyfill/Cargo.toml
+++ b/src/agent-client-protocol-polyfill/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-polyfill"
-version = "2.2.0"
+version = "3.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true
diff --git a/src/agent-client-protocol-rmcp/CHANGELOG.md b/src/agent-client-protocol-rmcp/CHANGELOG.md
index 0a251381..cec8604f 100644
--- a/src/agent-client-protocol-rmcp/CHANGELOG.md
+++ b/src/agent-client-protocol-rmcp/CHANGELOG.md
@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [4.0.0](https://github.com/agentclientprotocol/rust-sdk/compare/agent-client-protocol-rmcp-v3.1.1...agent-client-protocol-rmcp-v4.0.0) - 2026-09-28
+
+### Added
+
+- *(rmcp)* [**breaking**] upgrade integration to rmcp 3.4
+- *(acp)* make schemars optional ([#373](https://github.com/agentclientprotocol/rust-sdk/pull/373))
+
 ### Breaking changes
 
 - Upgrade the public `rmcp` dependency from 2.x to 3.4. This requires the next
diff --git a/src/agent-client-protocol-rmcp/Cargo.toml b/src/agent-client-protocol-rmcp/Cargo.toml
index 4952b98d..e87f95a8 100644
--- a/src/agent-client-protocol-rmcp/Cargo.toml
+++ b/src/agent-client-protocol-rmcp/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-rmcp"
-version = "3.1.1"
+version = "4.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true
diff --git a/src/agent-client-protocol-trace-viewer/CHANGELOG.md b/src/agent-client-protocol-trace-viewer/CHANGELOG.md
index 876ccbe9..6b5a43f7 100644
--- a/src/agent-client-protocol-trace-viewer/CHANGELOG.md
+++ b/src/agent-client-protocol-trace-viewer/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.0.0](https://github.com/agentclientprotocol/rust-sdk/compare/agent-client-protocol-trace-viewer-v2.2.0...agent-client-protocol-trace-viewer-v3.0.0) - 2026-09-28
+
+### Other
+
+- update Cargo.lock dependencies
+
 ## [2.2.0](https://github.com/agentclientprotocol/rust-sdk/compare/agent-client-protocol-trace-viewer-v2.1.0...agent-client-protocol-trace-viewer-v2.2.0) - 2026-09-18
 
 ### Other
diff --git a/src/agent-client-protocol-trace-viewer/Cargo.toml b/src/agent-client-protocol-trace-viewer/Cargo.toml
index c12d041f..7a8570e9 100644
--- a/src/agent-client-protocol-trace-viewer/Cargo.toml
+++ b/src/agent-client-protocol-trace-viewer/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol-trace-viewer"
-version = "2.2.0"
+version = "3.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true
diff --git a/src/agent-client-protocol/CHANGELOG.md b/src/agent-client-protocol/CHANGELOG.md
index fa0324ee..27bea55f 100644
--- a/src/agent-client-protocol/CHANGELOG.md
+++ b/src/agent-client-protocol/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ## [Unreleased]
 
+## [3.0.0](https://github.com/agentclientprotocol/rust-sdk/compare/v2.2.0...v3.0.0) - 2026-09-28
+
+### Added
+
+- *(acp)* make schemars optional ([#373](https://github.com/agentclientprotocol/rust-sdk/pull/373))
+
 ### Added
 
 - Add a default-enabled `schemars` feature that forwards JSON Schema support to
diff --git a/src/agent-client-protocol/Cargo.toml b/src/agent-client-protocol/Cargo.toml
index 4939a6e8..095d2f0f 100644
--- a/src/agent-client-protocol/Cargo.toml
+++ b/src/agent-client-protocol/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "agent-client-protocol"
-version = "2.2.0"
+version = "3.0.0"
 edition.workspace = true
 rust-version.workspace = true
 authors.workspace = true