diff --git a/Cargo.lock b/Cargo.lock
index c51843440a3..ea81a95f580 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -103,12 +103,6 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f8cb5d814eb646a863c4f24978cff2880c4be96ad8cde2c0f0678732902e271"
 
-[[package]]
-name = "arrayref"
-version = "0.3.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
-
 [[package]]
 name = "arrayvec"
 version = "0.5.2"
@@ -138,12 +132,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8aac770f1885fd7e387acedd76065302551364496e46b3dd00860b2f8359b9d"
 
-[[package]]
-name = "base64"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
-
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -159,17 +147,6 @@ dependencies = [
  "typenum",
 ]
 
-[[package]]
-name = "blake2b_simd"
-version = "0.5.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8fb2d74254a3a0b5cac33ac9f8ed0e44aa50378d9dbb2e5d83bd21ed1dc2c8a"
-dependencies = [
- "arrayref",
- "arrayvec 0.5.2",
- "constant_time_eq",
-]
-
 [[package]]
 name = "block-buffer"
 version = "0.7.3"
@@ -735,12 +712,6 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c478836e029dcef17fb47c89023448c64f781a046e0300e257ad8225ae59afab"
 
-[[package]]
-name = "constant_time_eq"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
-
 [[package]]
 name = "core"
 version = "0.0.0"
@@ -988,9 +959,9 @@ dependencies = [
 
 [[package]]
 name = "directories"
-version = "3.0.1"
+version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8fed639d60b58d0f53498ab13d26f621fd77569cc6edb031f4cc36a2ad9da0f"
+checksum = "e69600ff1703123957937708eb27f7a564e48885c537782722ed0ba3189ce1d7"
 dependencies = [
  "dirs-sys",
 ]
@@ -1017,12 +988,12 @@ dependencies = [
 
 [[package]]
 name = "dirs-sys"
-version = "0.3.5"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e93d7f5705de3e49895a2b5e0b8855a1c27f080192ae9c32a6432d50741a57a"
+checksum = "03d86534ed367a67548dc68113a0f5db55432fdfbb6e6f9d77704397d95d5780"
 dependencies = [
  "libc",
- "redox_users 0.3.4",
+ "redox_users",
  "winapi 0.3.9",
 ]
 
@@ -1033,7 +1004,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
 dependencies = [
  "libc",
- "redox_users 0.4.0",
+ "redox_users",
  "winapi 0.3.9",
 ]
 
@@ -3052,17 +3023,6 @@ dependencies = [
  "bitflags",
 ]
 
-[[package]]
-name = "redox_users"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09b23093265f8d200fa7b4c2c76297f47e681c655f6f1285a8780d6a022f7431"
-dependencies = [
- "getrandom 0.1.14",
- "redox_syscall 0.1.57",
- "rust-argon2",
-]
-
 [[package]]
 name = "redox_users"
 version = "0.4.0"
@@ -3239,18 +3199,6 @@ dependencies = [
  "rls-span",
 ]
 
-[[package]]
-name = "rust-argon2"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2bc8af4bda8e1ff4932523b94d3dd20ee30a87232323eda55903ffd71d2fb017"
-dependencies = [
- "base64",
- "blake2b_simd",
- "constant_time_eq",
- "crossbeam-utils 0.7.2",
-]
-
 [[package]]
 name = "rust-demangler"
 version = "0.0.1"
@@ -5165,14 +5113,14 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.1.0"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
+checksum = "dac1c663cfc93810f88aed9b8941d48cabf856a1b111c29a40439018d870eb22"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "libc",
- "rand 0.7.3",
- "redox_syscall 0.1.57",
+ "rand 0.8.3",
+ "redox_syscall 0.2.5",
  "remove_dir_all",
  "winapi 0.3.9",
 ]
diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index 51f48d8f2ec..5a843ea61ec 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -35,11 +35,9 @@ const EXCEPTIONS: &[(&str, &str)] = &[
     ("ryu", "Apache-2.0 OR BSL-1.0"),   // rls/cargo/... (because of serde)
     ("bytesize", "Apache-2.0"),         // cargo
     ("im-rc", "MPL-2.0+"),              // cargo
-    ("constant_time_eq", "CC0-1.0"),    // rustfmt
     ("sized-chunks", "MPL-2.0+"),       // cargo via im-rc
     ("bitmaps", "MPL-2.0+"),            // cargo via im-rc
     ("crossbeam-queue", "MIT/Apache-2.0 AND BSD-2-Clause"), // rls via rayon
-    ("arrayref", "BSD-2-Clause"),       // cargo-miri/directories/.../rust-argon2 (redox)
     ("instant", "BSD-3-Clause"),        // rustc_driver/tracing-subscriber/parking_lot
     ("snap", "BSD-3-Clause"),           // rustc
     // FIXME: this dependency violates the documentation comment above: