diff --git a/Cargo.lock b/Cargo.lock
index b4752b9..977c79b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1476,7 +1476,6 @@ dependencies = [
  "bech32 0.12.0",
  "bs58",
  "hex",
- "ripemd 0.2.0",
  "serde",
  "serde_json",
  "sha2 0.11.0",
@@ -1492,7 +1491,6 @@ dependencies = [
  "bitcoin",
  "bs58",
  "ed25519-dalek",
- "serde",
  "serde_json",
  "tinybus",
  "tinybus-module",
diff --git a/crates/tinywallet-bus/Cargo.toml b/crates/tinywallet-bus/Cargo.toml
index 1ad2a0a..74a247a 100644
--- a/crates/tinywallet-bus/Cargo.toml
+++ b/crates/tinywallet-bus/Cargo.toml
@@ -29,9 +29,6 @@ hex = { version = "0.4", optional = true }
 # validate a Bitcoin address without the `bitcoin` crate's native secp256k1
 # build; see `src/address/btc.rs`.
 bech32 = { version = "0.12", optional = true }
-# RIPEMD-160, the second half of Bitcoin's HASH160. Feeds a `Sha256` (sha2
-# 0.11) output, so the two must sit on the same `digest` line — hence 0.2.
-ripemd = { version = "0.2", optional = true }
 # SHA-256: Bitcoin's HASH160, Tron's base58check checksum, and the Tron txid.
 sha2 = { version = "0.11", optional = true }
 # Keccak-256, the hash EIP-55 checksums and EIP-712 struct hashes are defined
@@ -62,7 +59,7 @@ serde_json = "1"
 default = ["btc", "evm", "solana", "tron", "keccak", "net", "asset", "wire", "eip712", "abi", "tx-codec"]
 # Bitcoin address parsing and validation. Dependency-light on purpose: base58
 # via `bs58` (already here for Solana and Tron) and segwit via `bech32`.
-btc = ["dep:bs58", "dep:bech32", "dep:ripemd", "dep:sha2"]
+btc = ["dep:bs58", "dep:bech32", "dep:sha2"]
 # Serde derives on the crate's core types (today `Chain`). A named gate rather
 # than relying on `dep:serde` being implied, because `#[cfg(feature = "serde")]`
 # on the enum has to name something that actually exists.
diff --git a/crates/tinywallet-module/Cargo.toml b/crates/tinywallet-module/Cargo.toml
index 64c596b..888a326 100644
--- a/crates/tinywallet-module/Cargo.toml
+++ b/crates/tinywallet-module/Cargo.toml
@@ -43,7 +43,6 @@ tinybus-module = { version = "0.1.0", path = "../../vendor/tinybus/crates/tinybu
 tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
 # Method arguments and returns are the `tinywallet::wire` contract, decoded from
 # and encoded to JSON frames.
-serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 # Base58 for a Solana transaction id, which is its 64-byte signature. The
 # library's own encoder takes a 32-byte address, so it does not fit here.