diff --git a/Cargo.lock b/Cargo.lock
index c165ee8..ee1318d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -326,7 +326,7 @@ dependencies = [
  "cfg-if 1.0.0",
  "instant",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "smallvec",
  "winapi",
 ]
@@ -441,6 +441,12 @@ dependencies = [
  "rand_core",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.1.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
+
 [[package]]
 name = "redox_syscall"
 version = "0.2.4"
@@ -689,7 +695,7 @@ dependencies = [
  "cfg-if 1.0.0",
  "libc",
  "rand",
- "redox_syscall",
+ "redox_syscall 0.2.4",
  "remove_dir_all",
  "winapi",
 ]