diff --git a/Cargo.lock b/Cargo.lock
index 52cfee7b7b..0260d3f99e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -12,8 +12,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "block-padding 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.12.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -31,12 +31,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "byteorder"
-version = "1.4.2"
+version = "1.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cc"
-version = "1.0.66"
+version = "1.0.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -44,7 +44,7 @@ name = "digest"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.12.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -54,10 +54,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "generic-array"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "typenum 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "typenum 1.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -91,7 +91,7 @@ dependencies = [
  "rand_chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "raw-cpuid 8.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -101,13 +101,13 @@ version = "8.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.67 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.4"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -147,7 +147,7 @@ dependencies = [
 
 [[package]]
 name = "typenum"
-version = "1.12.0"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
@@ -155,19 +155,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum block-buffer 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
 "checksum block-padding 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "fa79dedbb091f449f1f39e53edf88d5dbe95f895dae6135a8d7b881fb5af73f5"
 "checksum byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
-"checksum byteorder 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ae44d1a3d5a19df61dd0c8beb138458ac2a53a7ac09eba97d55592540004306b"
-"checksum cc 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)" = "4c0496836a84f8d0495758516b8621a622beb77c0fed418570e50764093ced48"
+"checksum byteorder 1.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
+"checksum cc 1.0.67 (registry+https://github.com/rust-lang/crates.io-index)" = "e3c69b077ad434294d3ce9f1f6143a2a4b89a8a2d54ef813d85003a4fd1137fd"
 "checksum digest 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f3d0c8c8752312f9713efd397ff63acb9f85585afbf179282e720e7704954dd5"
 "checksum fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
-"checksum generic-array 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
+"checksum generic-array 0.12.4 (registry+https://github.com/rust-lang/crates.io-index)" = "ffdf9f34f1447443d37393cc6c2b8313aebddcd96906caf34e54c68d8e57d7bd"
 "checksum opaque-debug 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
 "checksum ppv-lite86 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
 "checksum rand_chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
 "checksum rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 "checksum raw-cpuid 8.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1fdf7d9dbd43f3d81d94a49c1c3df73cc2b3827995147e6cf7f89d4ec5483e73"
-"checksum redox_syscall 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "05ec8ca9416c5ea37062b502703cd7fcb207736bc294f6e0cf367ac6fc234570"
+"checksum redox_syscall 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "85dd92e586f7355c633911e11f77f3d12f04b1b1bd76a198bd34ae3af8341ef2"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum sha2 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a256f46ea78a0c0d9ff00077504903ac881a1dafdc20da66545699e7776b3e69"
-"checksum typenum 1.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+"checksum typenum 1.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
diff --git a/Cargo.toml b/Cargo.toml
index 75cf334654..4030e3acbb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ version = "0.1.0"
 [dependencies]
 rand_chacha = "0.2"
 rand_core = "0.5"
-redox_syscall = "0.2.4"
+redox_syscall = "0.2.7"
 sha2 = "0.8"
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]
diff --git a/src/main.rs b/src/main.rs
index f99d4c7193..eaa8640ecf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -246,10 +246,10 @@ fn test_scheme_perms() {
 }
 
 impl SchemeMut for RandScheme {
-    fn open(&mut self, path: &[u8], flags: usize, uid: u32, gid: u32) -> Result<usize> {
+    fn open(&mut self, path: &str, flags: usize, uid: u32, gid: u32) -> Result<usize> {
         // We are only allowing
         // reads/writes from rand:/ and rand:/urandom - the root directory on its own is passed as an empty slice
-        if path != "".as_bytes() && path != "/urandom".as_bytes() {
+        if path != "" && path != "/urandom" {
             return Err(Error::new(ENOENT));
         }
         if flags & (O_CREAT | O_EXCL) == O_CREAT | O_EXCL {
@@ -288,7 +288,7 @@ impl SchemeMut for RandScheme {
         Ok(fd.0)
     }
 
-    fn chmod(&mut self, path: &[u8], mode: u16, uid: u32, gid: u32) -> Result<usize> {
+    fn chmod(&mut self, path: &str, mode: u16, uid: u32, gid: u32) -> Result<usize> {
         // Defer to fchmod
         let fd = self.open(path, O_WRONLY, uid, gid)?;
         self.fchmod(fd, mode)