diff --git a/Cargo.lock b/Cargo.lock
index f209c7a4..186ed5bb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,6 +5,7 @@ dependencies = [
  "base58 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bitcrypto 0.1.0",
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "chain 0.1.0",
  "eth-secp256k1 0.5.6 (git+https://github.com/ethcore/rust-secp256k1)",
  "lazy_static 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "primitives 0.1.0",
@@ -40,6 +41,16 @@ name = "byteorder"
 version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "chain"
+version = "0.1.0"
+dependencies = [
+ "bitcrypto 0.1.0",
+ "primitives 0.1.0",
+ "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serialization 0.1.0",
+]
+
 [[package]]
 name = "eth-secp256k1"
 version = "0.5.6"
diff --git a/Cargo.toml b/Cargo.toml
index 2b35824b..ba20c540 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,8 @@ rustc-serialize = "0.3"
 lazy_static = "0.2"
 eth-secp256k1 = { git = "https://github.com/ethcore/rust-secp256k1" }
 base58 = "0.1"
-primitives = { path = "primitives" }
+
 bitcrypto = { path = "crypto" }
+chain = { path = "chain" }
+primitives = { path = "primitives" }
 serialization = { path = "serialization" }
diff --git a/chain/Cargo.toml b/chain/Cargo.toml
new file mode 100644
index 00000000..57d0cc9e
--- /dev/null
+++ b/chain/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "chain"
+version = "0.1.0"
+authors = ["debris <marek.kotewicz@gmail.com>"]
+
+[dependencies]
+rustc-serialize = "0.3"
+bitcrypto = { path = "../crypto" }
+primitives = { path = "../primitives" }
+serialization = { path = "../serialization" }
+
diff --git a/src/chain/block.rs b/chain/src/block.rs
similarity index 97%
rename from src/chain/block.rs
rename to chain/src/block.rs
index 854fa34d..165e4238 100644
--- a/src/chain/block.rs
+++ b/chain/src/block.rs
@@ -1,12 +1,12 @@
 use hex::FromHex;
-use chain::{BlockHeader, Transaction};
-use chain::merkle_root::merkle_root;
 use crypto::dhash256;
 use hash::H256;
 use ser::{
 	Deserializable, Reader, Error as ReaderError, deserialize,
 	Serializable, Stream, serialize
 };
+use merkle_root::merkle_root;
+use {BlockHeader, Transaction};
 
 pub struct Block {
 	block_header: BlockHeader,
diff --git a/src/chain/block_header.rs b/chain/src/block_header.rs
similarity index 100%
rename from src/chain/block_header.rs
rename to chain/src/block_header.rs
diff --git a/src/chain/mod.rs b/chain/src/lib.rs
similarity index 63%
rename from src/chain/mod.rs
rename to chain/src/lib.rs
index 43cf8912..efe75e61 100644
--- a/src/chain/mod.rs
+++ b/chain/src/lib.rs
@@ -1,8 +1,16 @@
+extern crate rustc_serialize;
+extern crate primitives;
+extern crate bitcrypto as crypto;
+extern crate serialization as ser;
+
 mod block;
 mod block_header;
 mod merkle_root;
 mod transaction;
 
+pub use rustc_serialize::hex;
+pub use primitives::{hash, bytes};
+
 pub use self::block::Block;
 pub use self::block_header::BlockHeader;
 pub use self::transaction::{
diff --git a/src/chain/merkle_root.rs b/chain/src/merkle_root.rs
similarity index 100%
rename from src/chain/merkle_root.rs
rename to chain/src/merkle_root.rs
diff --git a/src/chain/transaction.rs b/chain/src/transaction.rs
similarity index 100%
rename from src/chain/transaction.rs
rename to chain/src/transaction.rs
diff --git a/src/lib.rs b/src/lib.rs
index b2fa5cb0..ecdfb36e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,8 +3,8 @@
 //! module(depends_on..)
 //!
 //! net(primitives, serialization)
-//! script(primitives, serialization, chain)
-//! chain(primitives, serialization)
+//! script(primitives, serialization, chain, crypto)
+//! chain(primitives, serialization, crypto)
 //! keys(primitives, crypto)
 //! crypto(primitives)
 //! serialization(primitives)
@@ -17,11 +17,12 @@ extern crate rustc_serialize;
 extern crate lazy_static;
 extern crate secp256k1;
 extern crate base58;
-extern crate primitives;
+
 extern crate bitcrypto as crypto;
+extern crate chain;
+extern crate primitives;
 extern crate serialization as ser;
 
-pub mod chain;
 pub mod keys;
 pub mod net;
 pub mod script;