diff --git a/.cargo/config b/.cargo/config
index 6d19e69..c472e4f 100644
--- a/.cargo/config
+++ b/.cargo/config
@@ -1,4 +1,4 @@
-[target.x86_64-apple-darwin]
+[target.'cfg(target_os = "macos")']
 rustflags = [
 	  "-C", "link-arg=-undefined",
 	  "-C", "link-arg=dynamic_lookup",
diff --git a/Cargo.lock b/Cargo.lock
index df69786..02bb586 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,166 +1,188 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aes"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54eb1d8fe354e5fc611daf4f2ea97dd45a765f4f1e4512306ec183ae2e8f20c9"
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- "aes-soft 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "aesni 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aes-soft",
+ "aesni",
+ "block-cipher-trait",
 ]
 
 [[package]]
 name = "aes-ctr"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2e5b0458ea3beae0d1d8c0f3946564f8e10f90646cf78c06b4351052058d1ee"
 dependencies = [
- "aes-soft 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "aesni 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ctr 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "stream-cipher 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "aes-soft",
+ "aesni",
+ "ctr",
+ "stream-cipher",
 ]
 
 [[package]]
 name = "aes-soft"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cfd7e7ae3f9a1fb5c03b389fc6bb9a51400d0c13053f0dca698c832bfd893a0d"
 dependencies = [
- "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait",
+ "byteorder",
+ "opaque-debug",
 ]
 
 [[package]]
 name = "aesni"
 version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f70a6b5f971e473091ab7cfb5ffac6cde81666c4556751d8d5620ead8abf100"
 dependencies = [
- "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "stream-cipher 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait",
+ "opaque-debug",
+ "stream-cipher",
 ]
 
 [[package]]
 name = "ahash"
 version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f00e10d4814aa20900e7948174384f79f1317f24f0ba7494e735111653fc330"
 dependencies = [
- "const-random 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "const-random",
 ]
 
 [[package]]
 name = "aho-corasick"
 version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58fb5e95d83b38284460a5fda7d6470aa0b8844d283a0b614b8535e880800d2d"
 dependencies = [
- "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr",
 ]
 
 [[package]]
 name = "arrayref"
 version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d382e583f07208808f6b1249e60848879ba3543f57c32277bf52d69c2f0f0ee"
 
 [[package]]
 name = "arrayvec"
 version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd9fd44efafa8690358b7408d253adf110036b88f55672a933f01d616ad9b1b9"
 dependencies = [
- "nodrop 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nodrop",
 ]
 
 [[package]]
 name = "arrayvec"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cff77d8686867eceff3105329d4698d96c2391c176d5d03adc90c7389162b5b8"
 
 [[package]]
 name = "autocfg"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
 
 [[package]]
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+checksum = "924c76597f0d9ca25d762c25a4d369d51267536465dc5064bdf0eb073ed477ea"
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- "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys",
+ "cfg-if",
+ "libc",
+ "rustc-demangle",
 ]
 
 [[package]]
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+checksum = "5d6575f128516de27e3ce99689419835fce9643a9b215a14d2b5b685be018491"
 dependencies = [
- "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc",
+ "libc",
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 [[package]]
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+checksum = "489d6c0ed21b11d038c31b6ceccca973e65d73ba3bd8ecb9a2babf5546164643"
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- "safemem 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
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+checksum = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
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- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
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 [[package]]
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+checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
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+checksum = "9633b74910e1870f50f5af189b08487195cdb83c0e27a71d6f64d5e09dd0538b"
 
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+checksum = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
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- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-padding",
+ "byte-tools",
+ "byteorder",
+ "generic-array",
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 [[package]]
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+checksum = "1c924d49bd09e7c06003acda26cd9742e796e34282ec6c1189404dee0c1f4774"
 dependencies = [
- "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array",
 ]
 
 [[package]]
 name = "block-modes"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "31aa8410095e39fdb732909fb5730a48d5bd7c2e3cd76bd1b07b3dbea130c529"
 dependencies = [
- "block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "block-padding 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait",
+ "block-padding",
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 [[package]]
 name = "block-padding"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d4dc3af3ee2e12f3e5d224e5e1e3d73668abbeb69e566d361f7d5563a4fdf09"
 dependencies = [
- "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byte-tools",
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 [[package]]
@@ -168,85 +190,96 @@ name = "bn"
 version = "0.4.4"
 source = "git+https://github.com/paritytech/bn#6079255e65793038b9a6e5292203eab482737cc2"
 dependencies = [
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- "rand 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-hex 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "crunchy 0.2.2",
+ "lazy_static",
+ "rand 0.5.6",
+ "rustc-hex 2.0.1",
 ]
 
 [[package]]
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 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7cbcbf18128ec71d8d4a0d054461ec59fff5b75b7d10a4c9b7c7cb1a379c3e77"
 
 [[package]]
 name = "byte-tools"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 
 [[package]]
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 version = "1.3.2"
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+checksum = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
 
 [[package]]
 name = "bytes"
 version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206fdffcfa2df7cbe15601ef46c813fce0965eb3286db6b56c583b814b51c81c"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "iovec",
 ]
 
 [[package]]
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 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "214238caa1bf3a496ec3392968969cab8549f96ff30652c9e56885329315f6bb"
 dependencies = [
- "ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ppv-lite86",
 ]
 
 [[package]]
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 version = "1.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8a318911dce53b5f1ca6539c44f5342c632269f0fa7ea3e35f32458c27a7c30"
 
 [[package]]
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 [[package]]
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+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
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+checksum = "e8493056968583b0193c1bb04d6f7684586f3726992d6c573261941a895dbd68"
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- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "num-integer",
+ "num-traits",
+ "time",
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 [[package]]
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 version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 dependencies = [
- "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags",
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81fb25b677f8bf1eb325017cb6bb8452f87969db0fedb4f757b297bee78a7c62"
 dependencies = [
- "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc",
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 [[package]]
@@ -254,149 +287,162 @@ name = "common-types"
 version = "0.1.0"
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- "keccak-hash 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-bytes 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-crypto 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "parity-snappy 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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- "rlp_derive 0.1.0 (git+https://github.com/paritytech/parity-ethereum.git?rev=acf7c48)",
- "unexpected 0.1.0 (git+https://github.com/paritytech/parity-ethereum.git?rev=acf7c48)",
- "vm 0.1.0 (git+https://github.com/paritytech/parity-ethereum.git?rev=acf7c48)",
+ "derive_more",
+ "ethbloom",
+ "ethcore-io",
+ "ethereum-types",
+ "ethjson",
+ "keccak-hash",
+ "parity-bytes",
+ "parity-crypto",
+ "parity-snappy",
+ "parity-util-mem",
+ "patricia-trie-ethereum",
+ "rlp",
+ "rlp_derive",
+ "unexpected",
+ "vm",
 ]
 
 [[package]]
 name = "const-random"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b641a8c9867e341f3295564203b1c250eb8ce6cb6126e007941f78c4d2ed7fe"
 dependencies = [
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- "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "proc-macro-hack",
 ]
 
 [[package]]
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 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c750ec12b83377637110d5a57f5ae08e895b06c4b16e2bdbf1a94ef717428c59"
 dependencies = [
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- "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "rand 0.7.2",
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05e44b8cf3e1a625844d1750e1f7820da46044ff6d28f4d43e455ba3e5bb2c13"
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- "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-epoch",
+ "crossbeam-utils",
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 [[package]]
 name = "crossbeam-deque"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b18cd2e169ad86297e6bc0ad9aa679aee9daa4f19e8163860faf7c164e4f5a71"
 dependencies = [
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- "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-epoch",
+ "crossbeam-utils",
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fedcd6772e37f3da2a9af9bf12ebe046c0dfe657992377b4df982a2b54cd37a9"
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- "memoffset 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.4.12",
+ "cfg-if",
+ "crossbeam-utils",
+ "lazy_static",
+ "memoffset",
+ "scopeguard",
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c979cd6cfe72335896575c6b5688da489e420d36a27a0b9eb0c73db574b4a4b"
 dependencies = [
- "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04973fa96e96579258a5091af6003abde64af786b860f18622b82e026cca60e6"
 dependencies = [
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 [[package]]
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 [[package]]
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+checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
 
 [[package]]
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- "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "subtle 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array",
+ "subtle 1.0.0",
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 [[package]]
 name = "ctr"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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- "stream-cipher 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-cipher-trait",
+ "stream-cipher",
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 [[package]]
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- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static",
+ "proc-macro2 0.4.30",
+ "quote 0.6.13",
+ "regex",
+ "rustc_version",
+ "syn 0.15.44",
 ]
 
 [[package]]
 name = "digest"
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 dependencies = [
- "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array",
 ]
 
 [[package]]
 name = "ecrecover"
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- "base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "c_vec 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
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- "rustler 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.10.1",
+ "c_vec",
+ "ethcore-builtin",
+ "lazy_static",
+ "libc",
+ "parity-bytes",
+ "rustler",
 ]
 
 [[package]]
@@ -404,36 +450,30 @@ name = "eip-152"
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- "rustc-hex 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayref",
+ "rustc-hex 2.0.1",
 ]
 
 [[package]]
 name = "elastic-array"
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- "heapsize 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unreachable 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "heapsize",
 ]
 
 [[package]]
 name = "ethbloom"
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+checksum = "ee6ee7065ba6a1597cff1e0598cfc3b0b41b5f65ccdf605560a296e7d94e93bf"
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- "tiny-keccak 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crunchy 0.2.2",
+ "fixed-hash",
+ "impl-rlp",
+ "impl-serde",
+ "tiny-keccak",
 ]
 
 [[package]]
@@ -441,17 +481,17 @@ name = "ethcore-builtin"
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- "parity-crypto 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bn",
+ "byteorder",
+ "common-types",
+ "eip-152",
+ "ethereum-types",
+ "ethjson",
+ "keccak-hash",
+ "log",
+ "num",
+ "parity-bytes",
+ "parity-crypto",
 ]
 
 [[package]]
@@ -459,29 +499,30 @@ name = "ethcore-io"
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- "timer 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tokio 0.1.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-deque 0.6.3",
+ "fnv",
+ "futures",
+ "log",
+ "num_cpus",
+ "parking_lot",
+ "slab",
+ "time",
+ "timer",
+ "tokio",
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 [[package]]
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- "primitive-types 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "uint 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ethbloom",
+ "fixed-hash",
+ "impl-rlp",
+ "impl-serde",
+ "primitive-types",
+ "uint",
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 [[package]]
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+ "ethereum-types",
+ "rustc-hex 1.0.0",
+ "serde",
+ "serde_json",
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 [[package]]
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- "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace",
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 [[package]]
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 [[package]]
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- "static_assertions 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "libc",
+ "rand 0.7.2",
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+ "static_assertions",
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 [[package]]
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 [[package]]
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 [[package]]
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- "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags",
+ "fuchsia-zircon-sys",
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 [[package]]
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 [[package]]
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 [[package]]
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 [[package]]
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+ "cfg-if",
+ "libc",
+ "wasi",
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 [[package]]
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+ "ahash",
+ "autocfg",
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 [[package]]
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 dependencies = [
- "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "unicode-segmentation",
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 [[package]]
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- "crypto-mac 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crypto-mac",
+ "digest",
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 [[package]]
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 dependencies = [
- "parity-scale-codec 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parity-scale-codec",
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 [[package]]
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- "rlp 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rlp",
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 [[package]]
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 dependencies = [
- "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde",
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 [[package]]
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 dependencies = [
- "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
 ]
 
 [[package]]
 name = "itoa"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
 
 [[package]]
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+checksum = "e563fa6fe52b2686094846118bf2cb2e6f75e6b8cec6c3aba09be8e835c7f998"
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- "tiny-keccak 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "primitive-types",
+ "tiny-keccak",
 ]
 
 [[package]]
@@ -649,289 +719,318 @@ name = "keccak-hasher"
 version = "0.1.1"
 source = "git+https://github.com/paritytech/parity-ethereum.git?rev=acf7c48#acf7c48d7e0fcd67a6a409e47827febcd330ac69"
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- "tiny-keccak 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ethereum-types",
+ "hash-db",
+ "plain_hasher",
+ "tiny-keccak",
 ]
 
 [[package]]
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+checksum = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
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- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8",
+ "winapi-build",
 ]
 
 [[package]]
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+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
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+checksum = "1a31a0627fdf1f6a39ec0dd577e101440b7db22672c0901fe00a9a6fbb5c24e8"
 
 [[package]]
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+checksum = "f8912e782533a93a167888781b836336a6ca5da6175c05944c86cf28c31104dc"
 dependencies = [
- "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scopeguard",
 ]
 
 [[package]]
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+checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
 dependencies = [
- "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if",
 ]
 
 [[package]]
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+checksum = "e37c5d4cd9473c5f4c9c111f033f15d4df9bd378fdf615944e360a4f55a05f0b"
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- "synstructure 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6",
+ "syn 1.0.5",
+ "synstructure 0.12.1",
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 [[package]]
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 [[package]]
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 dependencies = [
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version",
 ]
 
 [[package]]
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- "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fuchsia-zircon",
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diff --git a/Cargo.toml b/Cargo.toml
index 77b26e5..16f6dbe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ ethcore-builtin = { git = "https://github.com/paritytech/parity-ethereum.git", r
 lazy_static = "1.3.0"
 libc = "0.2.60"
 parity-bytes = "0.1.0"
-rustler = "0.20.0"
+rustler = "0.21.0"
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/rebar.config b/rebar.config
index 181ce6c..fcf1a08 100644
--- a/rebar.config
+++ b/rebar.config
@@ -3,7 +3,7 @@
         {ecrecoverprebuilt,
          {ecrecoverprebuilt_app_with_priv_from_git,
           {git, "https://github.com/aeternity/ecrecover-prebuilt.git",
-           {ref, "274f90b"}}}}
+           {ref, "92c2609"}}}}
        ]}.
 
 {plugins, [{rebar_ecrecoverprebuilt_dep,
diff --git a/rebar.lock b/rebar.lock
index 20f86cf..436eda4 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -1,5 +1,5 @@
 [{<<"ecrecoverprebuilt">>,
   {ecrecoverprebuilt_app_with_priv_from_git,
       {git,"https://github.com/aeternity/ecrecover-prebuilt.git",
-          {ref,"274f90ba3d93468e8eec405309b43b6c97ae4246"}}},
+          {ref,"92c2609a03ce9ec8f466026efed6f0f35c715195"}}},
   0}].