diff --git a/Cargo.lock b/Cargo.lock
index f23bd62..e492a07 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,160 +4,181 @@
 name = "adler32"
 version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e522997b529f05601e05166c07ed17789691f562762c7f3b987263d2dedee5c"
 
 [[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 = "ansi_term"
 version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
 dependencies = [
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.7",
 ]
 
 [[package]]
 name = "arrayvec"
 version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8d73f9beda665eaa98ab9e4f7442bd4e7de6652587de55b2525e52e29c1b0ba"
 dependencies = [
- "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nodrop",
 ]
 
 [[package]]
 name = "atty"
 version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1803c647a3ec87095e7ae7acfca019e98de5ec9a7d01343f611cf3152ed71a90"
 dependencies = [
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc",
+ "winapi 0.3.7",
 ]
 
 [[package]]
 name = "autocfg"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22130e92352b948e7e82a49cdb0aa94f2211761117f29e052dd397c1ac33542b"
 
 [[package]]
 name = "backtrace"
 version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5164d292487f037ece34ec0de2fcede2faa162f085dd96d2385ab81b12765ba"
 dependencies = [
- "backtrace-sys 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys",
+ "cfg-if",
+ "libc",
+ "rustc-demangle",
 ]
 
 [[package]]
 name = "backtrace-sys"
 version = "0.1.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82a830b4ef2d1124a711c71d263c5abdc710ef8e907bd508c88be475cebc422b"
 dependencies = [
- "cc 1.0.38 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc",
+ "libc",
 ]
 
 [[package]]
 name = "base64"
 version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
 ]
 
 [[package]]
 name = "bit-vec"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f59bbe95d4e52a6398ec21238d31577f2b28a9d86807f06ca59d191d8440d0bb"
 
 [[package]]
 name = "bitflags"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d155346769a6855b86399e9bc3814ab343cd3d62c7e985113d46a0ec3c281fd"
 
 [[package]]
 name = "blake2b-rs"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e35e362830ef90ecea16f09b21b75d22d33a8562a679c74ab4f4fa49b4fcb87"
 dependencies = [
- "cc 1.0.38 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc",
 ]
 
 [[package]]
 name = "block-buffer"
 version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
 dependencies = [
- "block-padding 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "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",
 ]
 
 [[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",
 ]
 
 [[package]]
 name = "byte-tools"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 
 [[package]]
 name = "byteorder"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+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)",
- "either 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "either",
+ "iovec",
+ "serde",
 ]
 
 [[package]]
 name = "c2-chacha"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d64d04786e0f528460fc884753cf8dddcc466be308f6026f8e355c41a0e4101"
 dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static",
+ "ppv-lite86",
 ]
 
 [[package]]
 name = "cc"
 version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce400c638d48ee0e9ab75aef7997609ec57367ccfe1463f21bf53c3eca67bf46"
 
 [[package]]
 name = "cfg-if"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
 
 [[package]]
 name = "chrono"
 version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77d81f58b7301084de3b958691458a53c3f7e0b1d702f77e550b6a88e3a88abe"
 dependencies = [
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (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",
+ "serde",
+ "time",
 ]
 
 [[package]]
@@ -165,19 +186,19 @@ name = "ckb-chain-spec"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-crypto 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-dao-utils 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-error 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-hash 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-jsonrpc-types 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-pow 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-rational 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-resource 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-types 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "toml 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-crypto",
+ "ckb-dao-utils",
+ "ckb-error",
+ "ckb-hash",
+ "ckb-jsonrpc-types",
+ "ckb-pow",
+ "ckb-rational",
+ "ckb-resource",
+ "ckb-types",
+ "failure",
+ "serde",
+ "serde_derive",
+ "toml",
 ]
 
 [[package]]
@@ -185,12 +206,12 @@ name = "ckb-crypto"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-fixed-hash 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "faster-hex 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "secp256k1 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-fixed-hash",
+ "failure",
+ "faster-hex 0.4.1",
+ "lazy_static",
+ "rand 0.6.5",
+ "secp256k1",
 ]
 
 [[package]]
@@ -198,11 +219,11 @@ name = "ckb-dao-utils"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ckb-error 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-types 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "enum-display-derive 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "ckb-error",
+ "ckb-types",
+ "enum-display-derive",
+ "failure",
 ]
 
 [[package]]
@@ -210,9 +231,9 @@ name = "ckb-error"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-occupied-capacity 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "enum-display-derive 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-occupied-capacity",
+ "enum-display-derive",
+ "failure",
 ]
 
 [[package]]
@@ -220,9 +241,9 @@ name = "ckb-fixed-hash"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-fixed-hash-core 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-fixed-hash-hack 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "proc-macro-hack 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-fixed-hash-core",
+ "ckb-fixed-hash-hack",
+ "proc-macro-hack",
 ]
 
 [[package]]
@@ -230,9 +251,9 @@ name = "ckb-fixed-hash-core"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "faster-hex 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure",
+ "faster-hex 0.4.1",
+ "serde",
 ]
 
 [[package]]
@@ -240,11 +261,11 @@ name = "ckb-fixed-hash-hack"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-fixed-hash-core 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "proc-macro-hack 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-fixed-hash-core",
+ "proc-macro-hack",
+ "proc-macro2",
+ "quote 0.6.13",
+ "syn 0.15.43",
 ]
 
 [[package]]
@@ -252,7 +273,7 @@ name = "ckb-hash"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "blake2b-rs 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "blake2b-rs",
 ]
 
 [[package]]
@@ -260,12 +281,12 @@ name = "ckb-jsonrpc-types"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-types 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "faster-hex 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 10.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-types",
+ "faster-hex 0.4.1",
+ "jsonrpc-core",
+ "serde",
+ "serde_derive",
+ "serde_json",
 ]
 
 [[package]]
@@ -273,18 +294,18 @@ name = "ckb-logger"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ansi_term 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "backtrace 0.3.34 (registry+https://github.com/rust-lang/crates.io-index)",
- "chrono 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-channel 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "env_logger 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "sentry 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ansi_term",
+ "backtrace",
+ "chrono",
+ "crossbeam-channel",
+ "env_logger",
+ "lazy_static",
+ "log",
+ "parking_lot",
+ "regex",
+ "sentry",
+ "serde",
+ "serde_derive",
 ]
 
 [[package]]
@@ -292,9 +313,9 @@ name = "ckb-occupied-capacity"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-occupied-capacity-core 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "ckb-occupied-capacity-macros 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "proc-macro-hack 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-occupied-capacity-core",
+ "ckb-occupied-capacity-macros",
+ "proc-macro-hack",
 ]
 
 [[package]]
@@ -302,8 +323,8 @@ name = "ckb-occupied-capacity-core"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde",
+ "serde_derive",
 ]
 
 [[package]]
@@ -311,10 +332,10 @@ name = "ckb-occupied-capacity-macros"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "ckb-occupied-capacity-core 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "proc-macro-hack 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ckb-occupied-capacity-core",
+ "proc-macro-hack",
+ "quote 0.6.13",
+ "syn 0.15.43",
 ]
 
 [[package]]
@@ -322,11 +343,11 @@ name = "ckb-pow"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ckb-types 0.24.0-pre (git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5)",
- "eaglesong 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder",
+ "ckb-types",
+ "eaglesong",
+ "serde",
+ "serde_derive",
 ]
 
 [[package]]
@@ -334,7 +355,7 @@ name = "ckb-rational"
 version = "0.24.0-pre"
 source = "git+https://github.com/nervosnetwork/ckb.git?rev=d75e4c5#d75e4c56ffa40e17fd2fe477da3f98c5578edcd1"
 dependencies = [
- "numext-fixed-uint 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "numext-fixed-uint",
 ]
 
 [[package]]
@@ -342,15 +363,15 @@ name = "ckb-resource"
 version = "0.24.0-pre"
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+ "includedir",
+ "includedir_codegen",
+ "phf",
+ "serde",
+ "serde_derive",
+ "tempfile",
+ "walkdir",
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+ "winapi 0.2.8",
+ "winapi-build",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 5f2b5ef..dcdf376 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ phf = "0.7.21"
 [build-dependencies]
 includedir_codegen = "0.5.0"
 blake2b-rs = "0.1.5"
-faster-hex = "0.4.1"
+faster-hex = "0.6.0"
 
 [dev-dependencies]
 byteorder = "1.3.1"
@@ -31,4 +31,4 @@ lazy_static = "1.3.0"
 ripemd160 = "0.8.0"
 sha2 = "0.8.0"
 secp256k1 = { version = "0.15.1" }
-faster-hex = "0.4.1"
+faster-hex = "0.6.0"
diff --git a/build.rs b/build.rs
index 0c714a4..af04d80 100644
--- a/build.rs
+++ b/build.rs
@@ -62,7 +62,7 @@ fn main() {
         let mut hash = [0u8; 32];
         blake2b.finalize(&mut hash);
 
-        let actual_hash = faster_hex::hex_string(&hash).unwrap();
+        let actual_hash = faster_hex::hex_string(&hash);
         if expected_hash != &actual_hash {
             errors.push((name, expected_hash, actual_hash));
             continue;