diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
index 4c36020..b1a8770 100644
--- a/.github/workflows/workspace.yml
+++ b/.github/workflows/workspace.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: RustCrypto/actions/cargo-cache@master
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.56.0 # MSRV
+          toolchain: 1.71.0
           components: clippy
       - run: cargo clippy --all --all-features -- -D warnings
 
diff --git a/Cargo.lock b/Cargo.lock
index e7e3784..3495ac3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -94,9 +94,9 @@ dependencies = [
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03e69e28e9f7f77debdedbaafa2866e1de9ba56df55a8bd7cfc724c25a09987c"
+checksum = "a17b76ff3a4162b0b27f354a0c87015ddad39d35f9c0c36607a3bdd175dde1f1"
 dependencies = [
  "libc",
 ]
@@ -165,18 +165,18 @@ dependencies = [
 
 [[package]]
 name = "kuznyechik"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8483b65417c9aca2348085fecc5eaef5af04834190b329dddd90f562204e632b"
+checksum = "ca7899a524198c60ded686fc826703de2a04470aff9d042e8cc1f845b912c12f"
 dependencies = [
  "cipher",
 ]
 
 [[package]]
 name = "libc"
-version = "0.2.146"
+version = "0.2.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f92be4933c13fd498862a9e02a3055f8a8d9c039ce33db97306fd5a6caa7f29b"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
 
 [[package]]
 name = "magma"
diff --git a/cfb-mode/tests/aes.rs b/cfb-mode/tests/aes.rs
index 188ea47..e0eccf7 100644
--- a/cfb-mode/tests/aes.rs
+++ b/cfb-mode/tests/aes.rs
@@ -39,11 +39,11 @@ fn aes128_cfb_async_test() {
         *b = (i % 11) as u8;
     }
     let enc = Enc::new_from_slices(&key, &iv).unwrap();
-    let mut ct = pt.clone();
+    let mut ct = pt;
     enc.encrypt(&mut ct);
     for i in 1..100 {
         let enc = Enc::new_from_slices(&key, &iv).unwrap();
-        let mut t = pt.clone();
+        let mut t = pt;
         let t = &mut t[..i];
         enc.encrypt(t);
         assert_eq!(t, &ct[..i]);
@@ -72,13 +72,13 @@ fn aes128_cfb_buffered_test() {
 
     // unbuffered
     let enc = Enc::new_from_slices(&key, &iv).unwrap();
-    let mut ct = pt.clone();
+    let mut ct = pt;
     enc.encrypt(&mut ct);
 
     // buffered
     for i in 1..100 {
         let mut buf_enc = BufEnc::new_from_slices(&key, &iv).unwrap();
-        let mut ct2 = pt.clone();
+        let mut ct2 = pt;
         for chunk in ct2.chunks_mut(i) {
             buf_enc.encrypt(chunk);
         }
@@ -94,7 +94,7 @@ fn aes128_cfb_buffered_test() {
     // buffered with restore
     for i in 1..100 {
         let mut buf_enc = BufEnc::new_from_slices(&key, &iv).unwrap();
-        let mut ct2 = pt.clone();
+        let mut ct2 = pt;
         for chunk in ct2.chunks_mut(i) {
             let (iv, pos) = buf_enc.get_state();
             let cipher = Aes128::new_from_slice(&key).unwrap();
diff --git a/cfb8/tests/aes.rs b/cfb8/tests/aes.rs
index f1f7ab9..4546a89 100644
--- a/cfb8/tests/aes.rs
+++ b/cfb8/tests/aes.rs
@@ -39,11 +39,11 @@ fn aes128_cfb8_async_test() {
         *b = (i % 11) as u8;
     }
     let enc = Enc::new_from_slices(&key, &iv).unwrap();
-    let mut ct = pt.clone();
+    let mut ct = pt;
     enc.encrypt(&mut ct);
     for i in 1..100 {
         let enc = Enc::new_from_slices(&key, &iv).unwrap();
-        let mut t = pt.clone();
+        let mut t = pt;
         let t = &mut t[..i];
         enc.encrypt(t);
         assert_eq!(t, &ct[..i]);