diff --git a/Cargo.lock b/Cargo.lock
index 5006885..ca0f4db 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -770,6 +770,12 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ef1a6892d9eef45c8fa6b9e0086428a2cca8491aca8f787c534a3d6d0bcb3ced"
 
+[[package]]
+name = "embedded-io"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
+
 [[package]]
 name = "env_logger"
 version = "0.10.2"
@@ -1636,12 +1642,13 @@ dependencies = [
 
 [[package]]
 name = "postcard"
-version = "1.0.8"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a55c51ee6c0db07e68448e336cf8ea4131a620edefebf9893e759b2d793420f8"
+checksum = "20ee10b999a00ca189ac2cb99f5db1ca71fb7371e3d5f493b879ca95d2a67220"
 dependencies = [
  "cobs",
- "embedded-io",
+ "embedded-io 0.4.0",
+ "embedded-io 0.6.1",
  "heapless",
  "serde",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 79ff083..3c1b13a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -63,7 +63,7 @@ zerocopy = { version = "0.7.35", features = ["derive"] }
 home = "0.5.9"
 derive_builder = "0.20.0"
 tokio = { version = "1.39", features = ["macros", "rt-multi-thread"] }
-postcard= {version = "1.0.8", features = ["alloc"]}
+postcard= {version = "1.0.9", features = ["alloc"]}
 libcrux = { version = "0.0.2-pre.2" }
 hex-literal = { version = "0.4.1" }
 hex = { version = "0.4.3" }