diff --git a/Cargo.lock b/Cargo.lock
index f574f97..309e91a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "atomic-polyfill"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8cf2bce30dfe09ef0bfaef228b9d414faaf7e563035494d7fe092dba54b300f4"
+dependencies = [
+ "critical-section",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.3.0"
@@ -26,12 +35,24 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "cobs"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67ba02a97a2bd10f4b59b25c7973101c79642302776489e030cd13cdab09ed15"
+
+[[package]]
+name = "critical-section"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7059fff8937831a9ae6f0fe4d658ffabf58f2ca96aa9dec1c889f936f705f216"
+
 [[package]]
 name = "dev_driver_rpc"
 version = "0.1.0"
 dependencies = [
  "parking_lot",
- "rmp-serde",
+ "postcard",
  "serde",
 ]
 
@@ -51,19 +72,48 @@ name = "devfs_rpc"
 version = "0.1.0"
 dependencies = [
  "parking_lot",
- "rmp-serde",
+ "postcard",
  "serde",
 ]
 
+[[package]]
+name = "embedded-io"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef1a6892d9eef45c8fa6b9e0086428a2cca8491aca8f787c534a3d6d0bcb3ced"
+
 [[package]]
 name = "fs_rpc"
 version = "0.1.0"
 dependencies = [
  "parking_lot",
- "rmp-serde",
+ "postcard",
  "serde",
 ]
 
+[[package]]
+name = "hash32"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0c35f58762feb77d74ebe43bdbc3210f09be9fe6742234d573bacc26ed92b67"
+dependencies = [
+ "byteorder",
+]
+
+[[package]]
+name = "heapless"
+version = "0.7.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdc6457c0eb62c71aac4bc17216026d8410337c4126773b9c5daba343f17964f"
+dependencies = [
+ "atomic-polyfill",
+ "hash32",
+ "rustc_version",
+ "serde",
+ "spin",
+ "stable_deref_trait",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.155"
@@ -80,15 +130,6 @@ dependencies = [
  "scopeguard",
 ]
 
-[[package]]
-name = "num-traits"
-version = "0.2.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -113,10 +154,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "paste"
-version = "1.0.15"
+name = "postcard"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
+checksum = "a55c51ee6c0db07e68448e336cf8ea4131a620edefebf9893e759b2d793420f8"
+dependencies = [
+ "cobs",
+ "embedded-io",
+ "heapless",
+ "serde",
+]
 
 [[package]]
 name = "proc-macro2"
@@ -146,25 +193,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "rmp"
-version = "0.8.14"
+name = "rustc_version"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "228ed7c16fa39782c3b3468e974aec2795e9089153cd08ee2e9aefb3613334c4"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
 dependencies = [
- "byteorder",
- "num-traits",
- "paste",
-]
-
-[[package]]
-name = "rmp-serde"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52e599a477cf9840e92f2cde9a7189e67b42c57532749bf90aea6ec10facd4db"
-dependencies = [
- "byteorder",
- "rmp",
- "serde",
+ "semver",
 ]
 
 [[package]]
@@ -173,6 +207,12 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
+[[package]]
+name = "semver"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
+
 [[package]]
 name = "serde"
 version = "1.0.203"
@@ -199,6 +239,21 @@ version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
+[[package]]
+name = "spin"
+version = "0.9.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
+dependencies = [
+ "lock_api",
+]
+
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
 [[package]]
 name = "syn"
 version = "2.0.66"
@@ -221,7 +276,7 @@ name = "vfs_rpc"
 version = "0.1.0"
 dependencies = [
  "parking_lot",
- "rmp-serde",
+ "postcard",
  "serde",
 ]
 
diff --git a/devfs_rpc/Cargo.toml b/devfs_rpc/Cargo.toml
index 395849a..b43e3af 100644
--- a/devfs_rpc/Cargo.toml
+++ b/devfs_rpc/Cargo.toml
@@ -5,5 +5,5 @@ edition = "2021"
 
 [dependencies]
 parking_lot = "0.12.3"
-rmp-serde = "1.3.0"
+postcard = { version = "1.0.8", features = ["use-std"] }
 serde = { version = "1.0.203", features = ["derive"] }
diff --git a/devfs_rpc/src/lib.rs b/devfs_rpc/src/lib.rs
index 863e01a..e813104 100644
--- a/devfs_rpc/src/lib.rs
+++ b/devfs_rpc/src/lib.rs
@@ -23,8 +23,8 @@ impl Client {
     }
 
     pub fn register_dev(self, name: &str) -> Result<(), ()> {
-        rmp_serde::from_slice(
-            &rpc::send_call(self.0, PROTO, 0, &rmp_serde::to_vec(name).unwrap()).get_return(),
+        postcard::from_bytes(
+            &rpc::send_call(self.0, PROTO, 0, &postcard::to_stdvec(name).unwrap()).get_return(),
         )
         .unwrap()
     }
@@ -44,8 +44,8 @@ fn callback(call: IncomingCall) {
     let server_lock = SERVER.read();
     let server = server_lock.as_ref().unwrap();
     if call.func == 0 {
-        let kind = rmp_serde::from_slice(&call.args).unwrap();
-        let ret = rmp_serde::to_vec(&server.register_dev(call.from, kind)).unwrap();
+        let kind = postcard::from_bytes(&call.args).unwrap();
+        let ret = postcard::to_stdvec(&server.register_dev(call.from, kind)).unwrap();
         call.send_return(&ret);
     }
 }