diff --git a/Cargo.lock b/Cargo.lock
index aa7cfeb8b..2c30b3d9b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -511,11 +511,11 @@ version = "0.0.1"
 dependencies = [
  "digest 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "md5 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex-syntax 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha1 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha3 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -530,6 +530,11 @@ dependencies = [
  "uucore 0.0.1",
 ]
 
+[[package]]
+name = "hex"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "hostid"
 version = "0.0.1"
@@ -1011,11 +1016,6 @@ dependencies = [
  "uucore 0.0.1",
 ]
 
-[[package]]
-name = "rustc-serialize"
-version = "0.3.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "rustc_version"
 version = "0.1.7"
@@ -1562,6 +1562,7 @@ dependencies = [
 "checksum getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "d9047cfbd08a437050b363d35ef160452c5fe8ea5187ae0a624708c91581d685"
 "checksum glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"
 "checksum half 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "63d68db75012a85555434ee079e7e6337931f87a087ab2988becbadf64673a7f"
+"checksum hex 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d6a22814455d41612f41161581c2883c0c6a1c41852729b17d5ed88f01e153aa"
 "checksum ioctl-sys 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "5e2c4b26352496eaaa8ca7cfa9bd99e93419d3f7983dc6e99c2a35fe9e33504a"
 "checksum itertools 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "772a0928a97246167d59a2a4729df5871f1327ab8b36fd24c4224b229cb47b99"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
@@ -1588,7 +1589,6 @@ dependencies = [
 "checksum regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1731164734096285ec2a5ec7fea5248ae2f5485b3feeb0115af4fda2183b2d1b"
 "checksum regex-syntax 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ad890a5eef7953f55427c50575c680c42841653abd2b028b68cd223d157f62db"
 "checksum remove_dir_all 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0882bc41b0ba6131c7f0ce97233b62d8099e3f3abc60d4938185d3e35439c0cc"
-"checksum rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)" = "dcf128d1287d2ea9d80910b5f1120d0b8eede3fbf1abe91c40d39ea7d51e6fda"
 "checksum rustc_version 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "c5f5376ea5e30ce23c03eb77cbe4962b988deead10910c372b226388b594c084"
 "checksum same-file 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d931a44fdaa43b8637009e7632a02adc4f2b2e0733c08caa4cf00e8da4a117a7"
 "checksum semver 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)" = "d4f410fedcf71af0345d7607d246e7ad15faaadd49d240ee3b24e5dc21a820ac"
diff --git a/src/hashsum/Cargo.toml b/src/hashsum/Cargo.toml
index 9f30881a6..8ad85c317 100644
--- a/src/hashsum/Cargo.toml
+++ b/src/hashsum/Cargo.toml
@@ -10,11 +10,11 @@ path = "hashsum.rs"
 [dependencies]
 digest = "0.6.2"
 getopts = "0.2.14"
+hex = "0.2.0"
 libc = "0.2.26"
 md5 = "0.3.5"
 regex = "0.2.2"
 regex-syntax = "0.4.1"
-rustc-serialize = "0.3.24"
 sha1 = "0.2.0"
 sha2 = "0.6.0"
 sha3 = "0.6.0"
diff --git a/src/hashsum/digest.rs b/src/hashsum/digest.rs
index 63ba505e7..8dd7c0142 100644
--- a/src/hashsum/digest.rs
+++ b/src/hashsum/digest.rs
@@ -1,11 +1,11 @@
 extern crate digest;
 extern crate md5;
-extern crate rustc_serialize;
 extern crate sha1;
 extern crate sha2;
 extern crate sha3;
 
 use digest::digest::{Input, ExtendableOutput, XofReader};
+use hex::ToHex;
 
 pub trait Digest {
     fn new() -> Self where Self: Sized;
@@ -17,8 +17,6 @@ pub trait Digest {
         (self.output_bits() + 7) / 8
     }
     fn result_str(&mut self) -> String {
-        use self::rustc_serialize::hex::ToHex;
-
         let mut buf: Vec<u8> = vec![0; self.output_bytes()];
         self.result(&mut buf);
         buf.to_hex()
diff --git a/src/hashsum/hashsum.rs b/src/hashsum/hashsum.rs
index d13f1dc02..afc677875 100644
--- a/src/hashsum/hashsum.rs
+++ b/src/hashsum/hashsum.rs
@@ -12,10 +12,10 @@
  */
 
 extern crate getopts;
+extern crate hex;
 extern crate md5;
 extern crate regex_syntax;
 extern crate regex;
-extern crate rustc_serialize as serialize;
 extern crate sha1;
 extern crate sha2;
 extern crate sha3;
@@ -26,9 +26,9 @@ extern crate uucore;
 mod digest;
 
 use digest::Digest;
+use hex::ToHex;
 use md5::Context as Md5;
 use regex::Regex;
-use serialize::hex::ToHex;
 use sha1::Sha1;
 use sha2::{Sha224, Sha256, Sha384, Sha512};
 use sha3::{Sha3_224, Sha3_256, Sha3_384, Sha3_512, Shake128, Shake256};