diff --git a/Cargo.lock b/Cargo.lock
index 84cdfad3..95cc181b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -70,30 +70,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "atomic-polyfill"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30302dda7a66f8c55932ebf208f7def840743ff64d495e9ceffcd97c18f11d39"
-dependencies = [
- "cortex-m",
-]
-
-[[package]]
-name = "bare-metal"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5deb64efa5bd81e31fcd1938615a6d98c82eafcbcd787162b6f63b91d6bac5b3"
-dependencies = [
- "rustc_version",
-]
-
-[[package]]
-name = "bitfield"
-version = "0.13.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
-
 [[package]]
 name = "blobby"
 version = "0.3.0"
@@ -166,18 +142,6 @@ dependencies = [
  "dbl",
 ]
 
-[[package]]
-name = "cortex-m"
-version = "0.7.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2ac919ef424449ec8c08d515590ce15d9262c0ca5f0da5b0c901e971a3b783b3"
-dependencies = [
- "bare-metal",
- "bitfield",
- "embedded-hal",
- "volatile-register",
-]
-
 [[package]]
 name = "cpufeatures"
 version = "0.1.5"
@@ -239,16 +203,6 @@ dependencies = [
  "subtle",
 ]
 
-[[package]]
-name = "embedded-hal"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db184d3fa27bc7a2344250394c0264144dfe0bc81a4401801dcb964b8dd172ad"
-dependencies = [
- "nb 0.1.3",
- "void",
-]
-
 [[package]]
 name = "generic-array"
 version = "0.14.4"
@@ -291,11 +245,10 @@ dependencies = [
 
 [[package]]
 name = "heapless"
-version = "0.7.3"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34e26526e7168021f34243a3c8faac4dc4f938cde75a0f9b8e373cca5eb4e7ce"
+checksum = "50530280e9a947b192e3a30a9d7bcead527b22da30ff7cbd334233d820aaf82a"
 dependencies = [
- "atomic-polyfill",
  "hash32",
  "stable_deref_trait",
 ]
@@ -327,18 +280,18 @@ dependencies = [
 
 [[package]]
 name = "kuznyechik"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1020a37e326b4033680520bf26d4ec7366f92827e5d2c5620a38511f2fd732c5"
+checksum = "7a4e0a85306cf7cdcd497111b9ecd8df4da5290bacd3cc2f426ce3fb2c0a327e"
 dependencies = [
  "cipher",
 ]
 
 [[package]]
 name = "libc"
-version = "0.2.98"
+version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "320cfe77175da3a483efed4bc0adc1968ca050b098ce4f2f1c13a56626128790"
+checksum = "3cb00336871be5ed2c8ed44b60ae9959dc5b9f08539422ed43f09e34ecaeba21"
 
 [[package]]
 name = "magma"
@@ -362,21 +315,6 @@ dependencies = [
  "subtle",
 ]
 
-[[package]]
-name = "nb"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "801d31da0513b6ec5214e9bf433a77966320625a37860f910be265be6e18d06f"
-dependencies = [
- "nb 1.0.0",
-]
-
-[[package]]
-name = "nb"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "546c37ac5d9e56f55e73b677106873d9d9f5190605e41a856503623648488cae"
-
 [[package]]
 name = "opaque-debug"
 version = "0.3.0"
@@ -431,15 +369,6 @@ dependencies = [
  "getrandom",
 ]
 
-[[package]]
-name = "rustc_version"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
-dependencies = [
- "semver",
-]
-
 [[package]]
 name = "salsa20"
 version = "0.8.1"
@@ -450,21 +379,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "semver"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
-dependencies = [
- "semver-parser",
-]
-
-[[package]]
-name = "semver-parser"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
-
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.0"
@@ -493,33 +407,12 @@ dependencies = [
  "subtle",
 ]
 
-[[package]]
-name = "vcell"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
-
 [[package]]
 name = "version_check"
 version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
 
-[[package]]
-name = "void"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
-
-[[package]]
-name = "volatile-register"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d67cb4616d99b940db1d6bd28844ff97108b498a6ca850e5b6191a532063286"
-dependencies = [
- "vcell",
-]
-
 [[package]]
 name = "wasi"
 version = "0.10.2+wasi-snapshot-preview1"
diff --git a/mgm/benches/mod.rs b/mgm/benches/mod.rs
index b911c84d..1123d8fa 100644
--- a/mgm/benches/mod.rs
+++ b/mgm/benches/mod.rs
@@ -53,9 +53,9 @@ fn encrypt_msg_only_16kb(b: &mut Bencher) {
 fn decrypt_aad_only_16kb(b: &mut Bencher) {
     let c = Mgm::<Kuznyechik>::new(GenericArray::from_slice(&KEY));
     let nonce = GenericArray::from_slice(&NONCE);
-    let tag = GenericArray::default();
     let aad = vec![0; 16 * 1024];
     let mut buf = [];
+    let tag = c.encrypt_in_place_detached(nonce, &aad, &mut []).unwrap();
 
     #[allow(unused_must_use)]
     b.iter(|| {
@@ -71,13 +71,14 @@ fn decrypt_aad_only_16kb(b: &mut Bencher) {
 fn decrypt_msg_only_16kb(b: &mut Bencher) {
     let c = Mgm::<Kuznyechik>::new(GenericArray::from_slice(&KEY));
     let nonce = GenericArray::from_slice(&NONCE);
-    let tag = GenericArray::default();
     let aad = [];
-    let mut buf = vec![0; 16 * 1024];
+    let mut buf = vec![0u8; 16 * 1024];
+    let tag = c.encrypt_in_place_detached(nonce, &aad, &mut buf).unwrap();
 
     #[allow(unused_must_use)]
     b.iter(|| {
-        let (aad, buf, tag) = test::black_box((&aad, &mut buf, &tag));
+        let mut buf_cpy = buf.clone();
+        let (aad, buf, tag) = test::black_box((&aad, &mut buf_cpy, &tag));
         let res = c.decrypt_in_place_detached(nonce, aad, buf, tag);
         test::black_box(res);
     });