diff --git a/.travis.yml b/.travis.yml
index 0abda2c30..0d27ff239 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,6 +20,7 @@ cache:
   - target/debug/build
   - target/release/deps
   - target/release/build
+  - $HOME/.cargo
 addons:
   apt:
     packages:
diff --git a/Cargo.lock b/Cargo.lock
index 7f05f1042..6cdb6f53f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,7 +2,7 @@
 name = "parity"
 version = "0.9.99"
 dependencies = [
- "clippy 0.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clippy 0.0.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "ctrlc 1.0.1 (git+https://github.com/tomusdrw/rust-ctrlc.git)",
  "daemonize 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "docopt 0.6.78 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -39,6 +39,9 @@ dependencies = [
 name = "aster"
 version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "syntex_syntax 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "bitflags"
@@ -62,7 +65,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "clippy"
-version = "0.0.41"
+version = "0.0.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "regex-syntax 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -180,7 +183,7 @@ dependencies = [
  "env_logger 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethash 0.9.99",
  "ethcore-util 0.9.99",
- "heapsize 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "heapsize 0.3.2 (git+https://github.com/nikvolf/heapsize)",
  "lazy_static 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -194,15 +197,20 @@ dependencies = [
 name = "ethcore-rpc"
 version = "0.9.99"
 dependencies = [
+<<<<<<< HEAD
+=======
+ "clippy 0.0.42 (registry+https://github.com/rust-lang/crates.io-index)",
+>>>>>>> rustup
  "ethcore 0.9.99",
  "ethcore-util 0.9.99",
  "ethsync 0.9.99",
- "jsonrpc-core 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 1.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "jsonrpc-http-server 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_codegen 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_macros 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "target_info 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -211,11 +219,15 @@ name = "ethcore-util"
 version = "0.9.99"
 dependencies = [
  "arrayvec 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+<<<<<<< HEAD
+=======
+ "clippy 0.0.42 (registry+https://github.com/rust-lang/crates.io-index)",
+>>>>>>> rustup
  "crossbeam 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "elastic-array 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "eth-secp256k1 0.5.4 (git+https://github.com/arkpar/rust-secp256k1.git)",
- "heapsize 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "heapsize 0.3.2 (git+https://github.com/nikvolf/heapsize)",
  "igd 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "json-tests 0.1.0",
@@ -238,6 +250,10 @@ dependencies = [
 name = "ethsync"
 version = "0.9.99"
 dependencies = [
+<<<<<<< HEAD
+=======
+ "clippy 0.0.42 (registry+https://github.com/rust-lang/crates.io-index)",
+>>>>>>> rustup
  "env_logger 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "ethcore 0.9.99",
  "ethcore-util 0.9.99",
@@ -265,11 +281,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "heapsize"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
+version = "0.3.2"
+source = "git+https://github.com/nikvolf/heapsize#a2d682fd4dcf11e2deeeb229ef2375354c15668b"
 
 [[package]]
 name = "hpack"
@@ -351,12 +364,13 @@ dependencies = [
 
 [[package]]
 name = "jsonrpc-core"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "serde 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_codegen 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_macros 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -365,7 +379,7 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "hyper 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 1.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -534,6 +548,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "quasi"
 version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "syntex_syntax 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "quasi_codegen"
@@ -541,14 +558,8 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aster 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "quasi_macros"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "quasi_codegen 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -636,7 +647,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aster 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "quasi 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "quasi_macros 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quasi_codegen 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syntex_syntax 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -648,14 +661,6 @@ dependencies = [
  "serde 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "serde_macros"
-version = "0.6.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "serde_codegen 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "sha3"
 version = "0.1.0"
@@ -687,11 +692,41 @@ name = "strsim"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "syntex"
+version = "0.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "syntex_syntax 0.28.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syntex_syntax"
+version = "0.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-serialize 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "term 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "target_info"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "term"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "time"
 version = "0.1.34"
@@ -738,6 +773,11 @@ name = "unicode-normalization"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unicode-xid"
+version = "0.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "url"
 version = "0.2.38"
diff --git a/Cargo.toml b/Cargo.toml
index c7620d5a2..8b9924a54 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ rustc-serialize = "0.3"
 docopt = "0.6"
 docopt_macros = "0.6"
 ctrlc = { git = "https://github.com/tomusdrw/rust-ctrlc.git" }
-clippy = { version = "0.0.41", optional = true }
+clippy = { version = "0.0.42", optional = true }
 ethcore-util = { path = "util" }
 ethcore = { path = "ethcore" }
 ethsync = { path = "sync" }
diff --git a/ethcore/Cargo.toml b/ethcore/Cargo.toml
index 4aafebba1..dee169c7e 100644
--- a/ethcore/Cargo.toml
+++ b/ethcore/Cargo.toml
@@ -11,20 +11,21 @@ log = "0.3"
 env_logger = "0.3"
 rustc-serialize = "0.3"
 rocksdb = "0.3"
-heapsize = "0.2.0"
+heapsize = { git = "https://github.com/nikvolf/heapsize" }
 rust-crypto = "0.2.34"
 time = "0.1"
 ethcore-util = { path = "../util" }
 evmjit = { path = "../evmjit", optional = true }
 ethash = { path = "../ethash" }
 num_cpus = "0.2"
-clippy = { version = "0.0.41", optional = true }
+clippy = { version = "0.0.42", optional = true }
 crossbeam = "0.1.5"
 lazy_static = "0.1"
 
 [features]
 jit = ["evmjit"]
 evm-debug = []
-json-tests = []
+json-tests = [ "heapsize/nightly" ]
 test-heavy = []
 dev = ["clippy"]
+default = [ "heapsize/nightly" ]
diff --git a/rpc/Cargo.toml b/rpc/Cargo.toml
index 107e22c07..f179b0c66 100644
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@@ -4,22 +4,28 @@ name = "ethcore-rpc"
 version = "0.9.99"
 license = "GPL-3.0"
 authors = ["Ethcore <admin@ethcore.io"]
+build = "build.rs"
 
 [lib]
 
 [dependencies]
 serde = "0.6.7"
-serde_macros = "0.6.13"
 serde_json = "0.6.0"
-jsonrpc-core = "1.1.2"
-jsonrpc-http-server = "1.1.2"
+jsonrpc-core = "1.1"
+jsonrpc-http-server = "1.1"
 ethcore-util = { path = "../util" }
 ethcore = { path = "../ethcore" }
 ethsync = { path = "../sync" }
-clippy = { version = "0.0.41", optional = true }
+clippy = { version = "0.0.42", optional = true }
 target_info = "0.1.0"
 rustc-serialize = "0.3"
+serde_macros = { version = "0.6.13", optional = true }
+
+[build-dependencies]
+serde_codegen = { "version" = "0.6.13", "optional" = true }
+syntex = "0.28.0"
 
 [features]
-default = []
+default = ["serde_codegen"]
+nightly = ["serde_macros"]
 dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev"]
diff --git a/rpc/build.rs b/rpc/build.rs
new file mode 100644
index 000000000..fe1a55694
--- /dev/null
+++ b/rpc/build.rs
@@ -0,0 +1,29 @@
+#[cfg(not(feature = "serde_macros"))]
+mod inner {
+    extern crate syntex;
+    extern crate serde_codegen;
+
+    use std::env;
+    use std::path::Path;
+
+    pub fn main() {
+        let out_dir = env::var_os("OUT_DIR").unwrap();
+
+        let src = Path::new("src/lib.rs.in");
+        let dst = Path::new(&out_dir).join("lib.rs");
+
+        let mut registry = syntex::Registry::new();
+
+        serde_codegen::register(&mut registry);
+        registry.expand("", &src, &dst).unwrap();
+    }
+}
+
+#[cfg(feature = "serde_macros")]
+mod inner {
+    pub fn main() {}
+}
+
+fn main() {
+    inner::main();
+}
diff --git a/rpc/src/lib.rs b/rpc/src/lib.rs
index cd059e6b1..c9542ade7 100644
--- a/rpc/src/lib.rs
+++ b/rpc/src/lib.rs
@@ -16,9 +16,8 @@
 
 //! Ethcore rpc.
 #![warn(missing_docs)]
-#![feature(custom_derive, custom_attribute, plugin)]
-#![plugin(serde_macros)]
-#![cfg_attr(feature="dev", plugin(clippy))]
+#![cfg_attr(nightly, feature(custom_derive, custom_attribute, plugin))]
+#![cfg_attr(nightly, plugin(serde_macros, clippy))]
 
 extern crate rustc_serialize;
 extern crate target_info;
@@ -30,38 +29,8 @@ extern crate ethcore_util as util;
 extern crate ethcore;
 extern crate ethsync;
 
-use self::jsonrpc_core::{IoHandler, IoDelegate};
+#[cfg(feature = "serde_macros")]
+include!("lib.rs.in");
 
-pub mod v1;
-
-/// Http server.
-pub struct HttpServer {
-	handler: IoHandler,
-	threads: usize
-}
-
-impl HttpServer {
-	/// Construct new http server object with given number of threads.
-	pub fn new(threads: usize) -> HttpServer {
-		HttpServer {
-			handler: IoHandler::new(),
-			threads: threads
-		}
-	}
-
-	/// Add io delegate.
-	pub fn add_delegate<D>(&mut self, delegate: IoDelegate<D>) where D: Send + Sync + 'static {
-		self.handler.add_delegate(delegate);
-	}
-
-	/// Start server asynchronously in new thread
-	pub fn start_async(self, addr: &str) {
-		let server = jsonrpc_http_server::Server::new(self.handler, self.threads);
-		server.start_async(addr)
-	}
-}
-
-/// Lib needs at least 1 test to generate coverage reports correctly.
-#[test]
-fn if_works() {
-}
+#[cfg(not(feature = "serde_macros"))]
+include!(concat!(env!("OUT_DIR"), "/lib.rs"));
diff --git a/rpc/src/lib.rs.in b/rpc/src/lib.rs.in
new file mode 100644
index 000000000..f09a25be8
--- /dev/null
+++ b/rpc/src/lib.rs.in
@@ -0,0 +1,30 @@
+use self::jsonrpc_core::{IoHandler, IoDelegate};
+
+pub mod v1;
+
+/// Http server.
+pub struct HttpServer {
+	handler: IoHandler,
+	threads: usize
+}
+
+impl HttpServer {
+	/// Construct new http server object with given number of threads.
+	pub fn new(threads: usize) -> HttpServer {
+		HttpServer {
+			handler: IoHandler::new(),
+			threads: threads
+		}
+	}
+
+	/// Add io delegate.
+	pub fn add_delegate<D>(&mut self, delegate: IoDelegate<D>) where D: Send + Sync + 'static {
+		self.handler.add_delegate(delegate);
+	}
+
+	/// Start server asynchronously in new thread
+	pub fn start_async(self, addr: &str) {
+		let server = jsonrpc_http_server::Server::new(self.handler, self.threads);
+		server.start_async(addr)
+	}
+}
diff --git a/sync/Cargo.toml b/sync/Cargo.toml
index fc56ba2b9..a99717150 100644
--- a/sync/Cargo.toml
+++ b/sync/Cargo.toml
@@ -10,7 +10,7 @@ authors = ["Ethcore <admin@ethcore.io"]
 [dependencies]
 ethcore-util = { path = "../util" }
 ethcore = { path = ".." }
-clippy = { version = "0.0.41", optional = true }
+clippy = { version = "0.0.42", optional = true }
 log = "0.3"
 env_logger = "0.3"
 time = "0.1.34"
diff --git a/util/Cargo.toml b/util/Cargo.toml
index 773e58de3..25626780f 100644
--- a/util/Cargo.toml
+++ b/util/Cargo.toml
@@ -6,6 +6,9 @@ name = "ethcore-util"
 version = "0.9.99"
 authors = ["Ethcore <admin@ethcore.io>"]
 
+[features]
+default = [ "heapsize/nightly" ]
+
 [dependencies]
 log = "0.3"
 env_logger = "0.3"
@@ -20,13 +23,13 @@ lazy_static = "0.1"
 eth-secp256k1 = { git = "https://github.com/arkpar/rust-secp256k1.git" }
 rust-crypto = "0.2.34"
 elastic-array = "0.4"
-heapsize = "0.2"
+heapsize = { git = "https://github.com/nikvolf/heapsize" }
 itertools = "0.4"
 crossbeam = "0.2"
 slab = { git = "https://github.com/arkpar/slab.git" }
 sha3 = { path = "sha3" }
 serde = "0.6.7"
-clippy = { version = "0.0.41", optional = true }
+clippy = { version = "0.0.42", optional = true }
 json-tests = { path = "json-tests" }
 target_info = "0.1.0"
 igd = "0.4.2"