diff --git a/.github/workflows/workspace.yml b/.github/workflows/workspace.yml
index 3f3eeace1..dc2b0f795 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: 1.60.0
+          toolchain: 1.71.0
           components: clippy
       - run: cargo clippy --all -- -D warnings
 
diff --git a/blake2/src/as_bytes.rs b/blake2/src/as_bytes.rs
index 743a5adc3..c77fcd6df 100644
--- a/blake2/src/as_bytes.rs
+++ b/blake2/src/as_bytes.rs
@@ -19,19 +19,12 @@ pub trait AsBytes {
 impl<T: Safe> AsBytes for [T] {
     #[inline]
     fn as_bytes(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(self.as_ptr() as *const u8, self.len() * mem::size_of::<T>())
-        }
+        unsafe { slice::from_raw_parts(self.as_ptr() as *const u8, mem::size_of_val(self)) }
     }
 
     #[inline]
     fn as_mut_bytes(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self.as_mut_ptr() as *mut u8,
-                self.len() * mem::size_of::<T>(),
-            )
-        }
+        unsafe { slice::from_raw_parts_mut(self.as_mut_ptr() as *mut u8, mem::size_of_val(self)) }
     }
 }
 
diff --git a/blake2/src/simd/simd_opt/u32x4.rs b/blake2/src/simd/simd_opt/u32x4.rs
index 8b34e76e8..7190d96f7 100644
--- a/blake2/src/simd/simd_opt/u32x4.rs
+++ b/blake2/src/simd/simd_opt/u32x4.rs
@@ -25,7 +25,7 @@ pub fn rotate_right_const(vec: u32x4, n: u32) -> u32x4 {
 
 #[inline(always)]
 fn rotate_right_any(vec: u32x4, n: u32) -> u32x4 {
-    let r = n as u32;
+    let r = n;
     let l = 32 - r;
 
     (vec >> u32x4::new(r, r, r, r)) ^ (vec << u32x4::new(l, l, l, l))
diff --git a/blake2/tests/mac.rs b/blake2/tests/mac.rs
index 97fbc9d70..dd75a5703 100644
--- a/blake2/tests/mac.rs
+++ b/blake2/tests/mac.rs
@@ -16,7 +16,7 @@ fn blake2b_new_test() {
             .chain_update(DATA)
             .finalize()
             .into_bytes();
-        let res2 = <T as Mac>::new_from_slice(&key)
+        let res2 = <T as Mac>::new_from_slice(key)
             .unwrap()
             .chain_update(DATA)
             .finalize()
diff --git a/streebog/src/table.rs b/streebog/src/table.rs
index 337578285..f47eb6133 100644
--- a/streebog/src/table.rs
+++ b/streebog/src/table.rs
@@ -2077,6 +2077,7 @@ mod test {
     use super::SHUFFLED_LIN_TABLE;
     use crate::consts::{A, P};
 
+    #[allow(clippy::needless_range_loop)]
     fn gen_table() -> [[u64; 256]; 8] {
         let mut table: [[u64; 256]; 8] = [[0; 256]; 8];
         for i in 0..8 {
diff --git a/tiger/src/lib.rs b/tiger/src/lib.rs
index a5f1f8d80..ed2830a7d 100644
--- a/tiger/src/lib.rs
+++ b/tiger/src/lib.rs
@@ -91,7 +91,7 @@ impl UpdateCore for TigerCore {
 impl FixedOutputCore for TigerCore {
     #[inline]
     fn finalize_fixed_core(&mut self, buffer: &mut Buffer<Self>, out: &mut Output<Self>) {
-        let bs = Self::BlockSize::U64 as u64;
+        let bs = Self::BlockSize::U64;
         let pos = buffer.get_pos() as u64;
         let bit_len = 8 * (pos + bs * self.block_len);
 
@@ -165,7 +165,7 @@ impl UpdateCore for Tiger2Core {
 impl FixedOutputCore for Tiger2Core {
     #[inline]
     fn finalize_fixed_core(&mut self, buffer: &mut Buffer<Self>, out: &mut Output<Self>) {
-        let bs = Self::BlockSize::U64 as u64;
+        let bs = Self::BlockSize::U64;
         let pos = buffer.get_pos() as u64;
         let bit_len = 8 * (pos + bs * self.block_len);