diff --git a/Cargo.lock b/Cargo.lock
index 4e6fbcdc3..1263f4f56 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1814,15 +1814,6 @@ 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 = "hermit-abi"
 version = "0.3.1"
@@ -2730,11 +2721,11 @@ dependencies = [
 
 [[package]]
 name = "num_cpus"
-version = "1.15.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
+checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
 dependencies = [
- "hermit-abi 0.2.6",
+ "hermit-abi 0.3.1",
  "libc",
 ]
 
diff --git a/zebra-rpc/Cargo.toml b/zebra-rpc/Cargo.toml
index e9c0f4d33..a41376cde 100644
--- a/zebra-rpc/Cargo.toml
+++ b/zebra-rpc/Cargo.toml
@@ -48,7 +48,7 @@ hyper = { version = "0.14.27", features = ["http1", "server"] }
 jsonrpc-core = "18.0.0"
 jsonrpc-derive = "18.0.0"
 jsonrpc-http-server = "18.0.0"
-num_cpus = "1.15.0"
+num_cpus = "1.16.0"
 
 # zebra-rpc needs the preserve_order feature in serde_json, which is a dependency of jsonrpc-core
 serde_json = { version = "1.0.99", features = ["preserve_order"] }