diff --git a/Cargo.lock b/Cargo.lock
index d34c24ea9..330a3ea56 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1193,7 +1193,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "hidapi"
 version = "0.3.1"
-source = "git+https://github.com/paritytech/hidapi-rs#70ec4bd1b755ec5dd32ad2be0c8345864147c8bc"
+source = "git+https://github.com/paritytech/hidapi-rs#d4d323767d6f27cf5a3d73fbae0b0f2134d579bf"
 dependencies = [
  "cc 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1845,7 +1845,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-integer 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2566,7 +2566,7 @@ dependencies = [
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.20 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]