diff --git a/Cargo.lock b/Cargo.lock
index d42ed3f3..cb9b9f78 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -115,16 +115,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "crossbeam-channel"
-version = "0.5.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
-]
-
 [[package]]
 name = "crossbeam-deque"
 version = "0.8.3"
@@ -218,15 +208,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "hermit-abi"
-version = "0.2.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "hex-literal"
 version = "0.4.1"
@@ -281,16 +262,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "num_cpus"
-version = "1.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
-dependencies = [
- "hermit-abi",
- "libc",
-]
-
 [[package]]
 name = "once_cell"
 version = "1.18.0"
@@ -390,9 +361,9 @@ dependencies = [
 
 [[package]]
 name = "rayon"
-version = "1.7.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d2df5196e37bcc87abebc0053e20787d73847bb33134a69841207dd0a47f03b"
+checksum = "9c27db03db7734835b3f53954b534c91069375ce6ccaa2e065441e07d9b6cdb1"
 dependencies = [
  "either",
  "rayon-core",
@@ -400,14 +371,12 @@ dependencies = [
 
 [[package]]
 name = "rayon-core"
-version = "1.11.0"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b8f95bd6966f5c87776639160a66bd8ab9895d9d4ab01ddba9fc60661aebe8d"
+checksum = "5ce3fb6ad83f861aac485e76e1985cd109d9a3713802152be56c3b1f0e0658ed"
 dependencies = [
- "crossbeam-channel",
  "crossbeam-deque",
  "crossbeam-utils",
- "num_cpus",
 ]
 
 [[package]]
diff --git a/balloon-hash/Cargo.toml b/balloon-hash/Cargo.toml
index f6a3c5b9..4b83f172 100644
--- a/balloon-hash/Cargo.toml
+++ b/balloon-hash/Cargo.toml
@@ -18,7 +18,7 @@ crypto-bigint = { version = "0.5", default-features = false, features = ["generi
 
 # optional dependencies
 password-hash = { version = "0.5", default-features = false, optional = true }
-rayon = { version = "1.7", optional = true }
+rayon = { version = "1.8", optional = true }
 zeroize = { version = "1", default-features = false, optional = true }
 
 [dev-dependencies]
diff --git a/pbkdf2/Cargo.toml b/pbkdf2/Cargo.toml
index fd68db0c..11b026c3 100644
--- a/pbkdf2/Cargo.toml
+++ b/pbkdf2/Cargo.toml
@@ -16,7 +16,7 @@ rust-version = "1.60"
 digest = { version = "0.10.7", features = ["mac"] }
 
 # optional dependencies
-rayon = { version = "1.7", optional = true }
+rayon = { version = "1.8", optional = true }
 password-hash = { version = "0.5", default-features = false, optional = true, features = ["rand_core"]  }
 hmac = { version = "0.12", default-features = false, optional = true }
 sha1 = { version = "0.10", default-features = false, optional = true }