diff --git a/Cargo.lock b/Cargo.lock
index a386b64..6fca2e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.15"
@@ -24,7 +26,7 @@ version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.1.18",
  "libc",
  "winapi",
 ]
@@ -127,6 +129,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "hermit-abi"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "humantime"
 version = "2.1.0"
@@ -194,11 +205,11 @@ dependencies = [
 
 [[package]]
 name = "num_cpus"
-version = "1.13.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
+checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.2.6",
  "libc",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 8a09dcf..06adef8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ serde = { version = "1.0.123", features = ["derive"] }
 
 [build-dependencies]
 bindgen = "0.57.0"
-num_cpus = "1.13.0"
+num_cpus = "1.15.0"
 proc-macro2 = "1.0.24"
 quote = "1.0.9"
 syn = { version = "1.0.60", features = [ "extra-traits", "full", "fold", "parsing" ] }