diff --git a/Cargo.lock b/Cargo.lock
index e4eaf77cd..69773af63 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -875,12 +875,8 @@ dependencies = [
  "ethereum-types 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethkey 0.3.0",
  "fastmap 0.1.0",
- "hashdb 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "heapsize 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ipnetwork 0.12.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "keccak-hash 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "keccak-hasher 0.1.1",
- "kvdb 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "kvdb-memorydb 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "macros 0.1.0",
@@ -889,7 +885,6 @@ dependencies = [
  "rand 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rlp 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hex 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "trace-time 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "triehash-ethereum 0.2.0",
 ]
diff --git a/ethcore/sync/Cargo.toml b/ethcore/sync/Cargo.toml
index 37c1d61c7..b5224cb00 100644
--- a/ethcore/sync/Cargo.toml
+++ b/ethcore/sync/Cargo.toml
@@ -17,23 +17,17 @@ ethcore-light = { path = "../light" }
 ethcore-transaction = { path = "../transaction" }
 ethcore = { path = ".." }
 ethereum-types = "0.4"
-hashdb = "0.2.1"
 fastmap = { path = "../../util/fastmap" }
 rlp = { version = "0.2.4", features = ["ethereum"] }
-rustc-hex = "1.0"
 keccak-hash = "0.1"
-keccak-hasher = { path = "../../util/keccak-hasher" }
 triehash-ethereum = {version = "0.2", path = "../../util/triehash-ethereum" }
-kvdb = "0.1"
 macros = { path = "../../util/macros" }
 log = "0.4"
 env_logger = "0.5"
 rand = "0.4"
 heapsize = "0.4"
-semver = "0.9"
 parking_lot = "0.6"
 trace-time = "0.1"
-ipnetwork = "0.12.6"
 
 [dev-dependencies]
 ethcore-io = { path = "../../util/io", features = ["mio"] }
@@ -41,3 +35,4 @@ ethkey = { path = "../../ethkey" }
 kvdb-memorydb = "0.1"
 ethcore-private-tx = { path = "../private-tx" }
 ethcore = { path = "..", features = ["test-helpers"] }
+rustc-hex = "1.0"
diff --git a/ethcore/sync/src/lib.rs b/ethcore/sync/src/lib.rs
index e35e9beda..294ba0cd7 100644
--- a/ethcore/sync/src/lib.rs
+++ b/ethcore/sync/src/lib.rs
@@ -30,17 +30,12 @@ extern crate ethcore_transaction as transaction;
 extern crate ethcore;
 extern crate ethereum_types;
 extern crate env_logger;
-extern crate hashdb;
 extern crate fastmap;
 extern crate rand;
-extern crate semver;
 extern crate parking_lot;
 extern crate rlp;
-extern crate ipnetwork;
 extern crate keccak_hash as hash;
-extern crate keccak_hasher;
 extern crate triehash_ethereum;
-extern crate kvdb;
 
 extern crate ethcore_light as light;