diff --git a/Cargo.lock b/Cargo.lock
index 9e3f913..85ec45f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -27,9 +27,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.137"
+version = "0.2.167"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"
+checksum = "09d6582e104315a817dff97f75133544b2e094ee22447d2acf4a74e189ba06fc"
 
 [[package]]
 name = "proc-macro2"