diff --git a/Cargo.lock b/Cargo.lock
index 29655346e..a9c8f9aac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7,7 +7,7 @@ dependencies = [
  "ethcore-logger 1.8.0",
  "ethcore-util 1.8.2",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-wasm 0.14.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parity-wasm 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "vm 0.1.0",
  "wasm-utils 0.1.0 (git+https://github.com/paritytech/wasm-utils)",
 ]
@@ -2401,7 +2401,7 @@ dependencies = [
 
 [[package]]
 name = "parity-wasm"
-version = "0.14.5"
+version = "0.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3583,7 +3583,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "wasm-utils"
 version = "0.1.0"
-source = "git+https://github.com/paritytech/wasm-utils#6a39db802eb6b67a0c4e5cf50741f965e217335a"
+source = "git+https://github.com/paritytech/wasm-utils#3d59f7ca0661317bc66894a26b2a5a319fa5d229"
 dependencies = [
  "byteorder 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.26.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3591,7 +3591,7 @@ dependencies = [
  "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-wasm 0.14.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parity-wasm 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3816,6 +3816,7 @@ dependencies = [
 "checksum parity-tokio-ipc 0.1.5 (git+https://github.com/nikvolf/parity-tokio-ipc)" = "<none>"
 "checksum parity-ui-precompiled 1.4.0 (git+https://github.com/paritytech/js-precompiled.git?branch=beta)" = "<none>"
 "checksum parity-wasm 0.14.5 (registry+https://github.com/rust-lang/crates.io-index)" = "d4502e18417d96bd8e72fca9ea4cc18f4d80288ff565582d10aefe86f18b4fc3"
+"checksum parity-wasm 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)" = "95f6243c2d6fadf903b5edfd0011817efc20522ce5f360abf4648c24ea87581a"
 "checksum parity-wordlist 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "81451bfab101d186f8fc4a0aa13cb5539b31b02c4ed96425a0842e2a413daba6"
 "checksum parking_lot 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "149d8f5b97f3c1133e3cfcd8886449959e856b557ff281e292b733d7c69e005e"
 "checksum parking_lot_core 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "4f610cb9664da38e417ea3225f23051f589851999535290e077939838ab7a595"
diff --git a/ethcore/src/executive.rs b/ethcore/src/executive.rs
index 2a70689db..8e47035c4 100644
--- a/ethcore/src/executive.rs
+++ b/ethcore/src/executive.rs
@@ -309,6 +309,7 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
 					code: Some(Arc::new(t.data.clone())),
 					data: None,
 					call_type: CallType::None,
+					params_type: vm::ParamsType::Embedded,
 				};
 				let mut out = if output_from_create { Some(vec![]) } else { None };
 				(self.create(params, &mut substate, &mut out, &mut tracer, &mut vm_tracer), out.unwrap_or_else(Vec::new))
@@ -326,6 +327,7 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
 					code_hash: Some(self.state.code_hash(address)?),
 					data: Some(t.data.clone()),
 					call_type: CallType::Call,
+					params_type: vm::ParamsType::Separate,
 				};
 				let mut out = vec![];
 				(self.call(params, &mut substate, BytesRef::Flexible(&mut out), &mut tracer, &mut vm_tracer), out)
diff --git a/ethcore/src/externalities.rs b/ethcore/src/externalities.rs
index c7cf62276..ff7805299 100644
--- a/ethcore/src/externalities.rs
+++ b/ethcore/src/externalities.rs
@@ -171,6 +171,7 @@ impl<'a, T: 'a, V: 'a, B: 'a> Ext for Externalities<'a, T, V, B>
 				code_hash: Some(code_hash),
 				data: Some(H256::from(number).to_vec()),
 				call_type: CallType::Call,
+				params_type: vm::ParamsType::Separate,
 			};
 
 			let mut output = H256::new();
@@ -219,6 +220,7 @@ impl<'a, T: 'a, V: 'a, B: 'a> Ext for Externalities<'a, T, V, B>
 			code_hash: code_hash,
 			data: None,
 			call_type: CallType::None,
+			params_type: vm::ParamsType::Embedded,
 		};
 
 		if !self.static_flag {
@@ -276,6 +278,7 @@ impl<'a, T: 'a, V: 'a, B: 'a> Ext for Externalities<'a, T, V, B>
 			code_hash: Some(code_hash),
 			data: Some(data.to_vec()),
 			call_type: call_type,
+			params_type: vm::ParamsType::Separate,
 		};
 
 		if let Some(value) = value {
diff --git a/ethcore/src/machine.rs b/ethcore/src/machine.rs
index 2536384e6..783dc8cc0 100644
--- a/ethcore/src/machine.rs
+++ b/ethcore/src/machine.rs
@@ -35,7 +35,7 @@ use tx_filter::TransactionFilter;
 use bigint::prelude::U256;
 use bytes::BytesRef;
 use util::Address;
-use vm::{CallType, ActionParams, ActionValue};
+use vm::{CallType, ActionParams, ActionValue, ParamsType};
 use vm::{EnvInfo, Schedule, CreateContractAddress};
 
 /// Parity tries to round block.gas_limit to multiple of this constant
@@ -149,6 +149,7 @@ impl EthereumMachine {
 			code_hash: Some(state.code_hash(&contract_address)?),
 			data: data,
 			call_type: CallType::Call,
+			params_type: ParamsType::Separate,
 		};
 		let mut ex = Executive::new(&mut state, &env_info, self);
 		let mut substate = Substate::new();
diff --git a/ethcore/src/spec/spec.rs b/ethcore/src/spec/spec.rs
index a1696c47b..451cb13f2 100644
--- a/ethcore/src/spec/spec.rs
+++ b/ethcore/src/spec/spec.rs
@@ -30,7 +30,7 @@ use parking_lot::RwLock;
 use rlp::{Rlp, RlpStream};
 use rustc_hex::FromHex;
 use util::*;
-use vm::{EnvInfo, CallType, ActionValue, ActionParams};
+use vm::{EnvInfo, CallType, ActionValue, ActionParams, ParamsType};
 
 use super::genesis::Genesis;
 use super::seal::Generic as GenericSeal;
@@ -504,6 +504,7 @@ impl Spec {
 					code: Some(Arc::new(constructor.clone())),
 					data: None,
 					call_type: CallType::None,
+					params_type: ParamsType::Embedded,
 				};
 
 				let mut substate = Substate::new();
diff --git a/ethcore/src/tests/evm.rs b/ethcore/src/tests/evm.rs
index 021ab444e..830fcb5d7 100644
--- a/ethcore/src/tests/evm.rs
+++ b/ethcore/src/tests/evm.rs
@@ -2,7 +2,7 @@
 
 use std::sync::Arc;
 use hash::keccak;
-use vm::{EnvInfo, ActionParams, ActionValue, CallType};
+use vm::{EnvInfo, ActionParams, ActionValue, CallType, ParamsType};
 use evm::{Factory, VMType};
 use executive::Executive;
 use state::Substate;
@@ -45,6 +45,7 @@ fn test_blockhash_eip210(factory: Factory) {
 			code_hash: Some(blockhash_contract_code_hash),
 			data: Some(H256::from(i - 1).to_vec()),
 			call_type: CallType::Call,
+			params_type: ParamsType::Separate,
 		};
 		let mut ex = Executive::new(&mut state, &env_info, &machine);
 		let mut substate = Substate::new();
@@ -67,6 +68,7 @@ fn test_blockhash_eip210(factory: Factory) {
 		code_hash: Some(get_prev_hash_code_hash),
 		data: None,
 		call_type: CallType::Call,
+		params_type: ParamsType::Separate,
 	};
 	let mut ex = Executive::new(&mut state, &env_info, &machine);
 	let mut substate = Substate::new();
diff --git a/ethcore/vm/src/action_params.rs b/ethcore/vm/src/action_params.rs
index f87b1e558..cf914126f 100644
--- a/ethcore/vm/src/action_params.rs
+++ b/ethcore/vm/src/action_params.rs
@@ -35,6 +35,15 @@ pub enum ActionValue {
 	Apparent(U256)
 }
 
+/// Type of the way parameters encoded
+#[derive(Clone, Debug)]
+pub enum ParamsType {
+	/// Parameters are included in code
+	Embedded,
+	/// Parameters are passed in data section
+	Separate,
+}
+
 impl ActionValue {
 	/// Returns action value as U256.
 	pub fn value(&self) -> U256 {
@@ -81,7 +90,8 @@ pub struct ActionParams {
 	pub data: Option<Bytes>,
 	/// Type of call
 	pub call_type: CallType,
-
+	/// Param types encoding
+	pub params_type: ParamsType,
 }
 
 impl Default for ActionParams {
@@ -99,6 +109,7 @@ impl Default for ActionParams {
 			code: None,
 			data: None,
 			call_type: CallType::None,
+			params_type: ParamsType::Separate,
 		}
 	}
 }
@@ -118,6 +129,7 @@ impl From<ethjson::vm::Transaction> for ActionParams {
 			gas_price: t.gas_price.into(),
 			value: ActionValue::Transfer(t.value.into()),
 			call_type: match address.is_zero() { true => CallType::None, false => CallType::Call },	// TODO @debris is this correct?
+			params_type: ParamsType::Separate,
 		}
 	}
 }
diff --git a/ethcore/vm/src/lib.rs b/ethcore/vm/src/lib.rs
index 56a380597..1f88bf625 100644
--- a/ethcore/vm/src/lib.rs
+++ b/ethcore/vm/src/lib.rs
@@ -35,7 +35,7 @@ mod error;
 
 pub mod tests;
 
-pub use action_params::{ActionParams, ActionValue};
+pub use action_params::{ActionParams, ActionValue, ParamsType};
 pub use call_type::CallType;
 pub use env_info::{EnvInfo, LastHashes};
 pub use schedule::{Schedule, CleanDustMode};
diff --git a/ethcore/wasm/Cargo.toml b/ethcore/wasm/Cargo.toml
index 1b18a5c2a..380ffdfcf 100644
--- a/ethcore/wasm/Cargo.toml
+++ b/ethcore/wasm/Cargo.toml
@@ -8,7 +8,7 @@ byteorder = "1.0"
 ethcore-util = { path = "../../util" }
 ethcore-bigint = { path = "../../util/bigint" }
 log = "0.3"
-parity-wasm = "0.14"
+parity-wasm = "0.15"
 wasm-utils = { git = "https://github.com/paritytech/wasm-utils" }
 vm = { path = "../vm" }
 ethcore-logger = { path = "../../logger" }
diff --git a/ethcore/wasm/src/lib.rs b/ethcore/wasm/src/lib.rs
index df5a4c043..70601144d 100644
--- a/ethcore/wasm/src/lib.rs
+++ b/ethcore/wasm/src/lib.rs
@@ -115,7 +115,18 @@ impl vm::Vm for WasmInterpreter {
 			&self.program,
 		);
 
-		let mut cursor = ::std::io::Cursor::new(&*code);
+		let (mut cursor, data_position) = match params.params_type {
+			vm::ParamsType::Embedded => {
+				let module_size = parity_wasm::peek_size(&*code);
+				(
+					::std::io::Cursor::new(&code[..module_size]),
+					module_size
+				)
+			},
+			vm::ParamsType::Separate => {
+				(::std::io::Cursor::new(&code[..]), 0)
+			},
+		};
 
 		let contract_module = wasm_utils::inject_gas_counter(
 			elements::Module::deserialize(
@@ -134,8 +145,19 @@ impl vm::Vm for WasmInterpreter {
 		let static_segment_cost = data_section_length * runtime.ext().schedule().wasm.static_region as u64;
 		runtime.charge(|_| static_segment_cost).map_err(Error)?;
 
-		let d_ptr = runtime.write_descriptor(&params.data.unwrap_or_default())
-			.map_err(Error)?;
+		let d_ptr = {
+			match params.params_type {
+				vm::ParamsType::Embedded => {
+					runtime.write_descriptor(
+						if data_position < code.len() { &code[data_position..] } else { &[] }
+					).map_err(Error)?
+				},
+				vm::ParamsType::Separate => {
+					runtime.write_descriptor(&params.data.unwrap_or_default())
+						.map_err(Error)?
+				}
+			}
+		};
 
 		{
 			let execution_params = runtime.execution_params()
diff --git a/ethcore/wasm/src/tests.rs b/ethcore/wasm/src/tests.rs
index 57b5ab6a8..c9174f288 100644
--- a/ethcore/wasm/src/tests.rs
+++ b/ethcore/wasm/src/tests.rs
@@ -677,3 +677,30 @@ fn externs() {
 
 	assert_eq!(gas_left, U256::from(91_857));
 }
+
+#[test]
+fn embedded_keccak() {
+
+	::ethcore_logger::init_log();
+	let mut code = load_sample!("keccak.wasm");
+	code.extend_from_slice(b"something");
+
+	let mut params = ActionParams::default();
+	params.gas = U256::from(100_000);
+	params.code = Some(Arc::new(code));
+	params.params_type = vm::ParamsType::Embedded;
+
+	let mut ext = FakeExt::new();
+
+	let (gas_left, result) = {
+		let mut interpreter = wasm_interpreter();
+		let result = interpreter.exec(params, &mut ext).expect("Interpreter to execute without any errors");
+		match result {
+			GasLeft::Known(_) => { panic!("keccak should return payload"); },
+			GasLeft::NeedsReturn { gas_left: gas, data: result, apply_state: _apply } => (gas, result.to_vec()),
+		}
+	};
+
+	assert_eq!(H256::from_slice(&result), H256::from("68371d7e884c168ae2022c82bd837d51837718a7f7dfb7aa3f753074a35e1d87"));
+	assert_eq!(gas_left, U256::from(80_452));
+}
\ No newline at end of file