diff --git a/boring/Cargo.toml b/boring/Cargo.toml
index 19e79432..96bfbc92 100644
--- a/boring/Cargo.toml
+++ b/boring/Cargo.toml
@@ -10,6 +10,7 @@ readme = "README.md"
 keywords = ["crypto", "tls", "ssl", "dtls"]
 categories = ["cryptography", "api-bindings"]
 edition = { workspace = true }
+rust-version = "1.70"
 
 [package.metadata.docs.rs]
 features = ["rpk", "pq-experimental", "underscore-wildcards"]
diff --git a/boring/src/asn1.rs b/boring/src/asn1.rs
index c5807947..9fb3fcaf 100644
--- a/boring/src/asn1.rs
+++ b/boring/src/asn1.rs
@@ -233,7 +233,7 @@ impl PartialEq<Asn1Time> for Asn1TimeRef {
     }
 }
 
-impl<'a> PartialEq<Asn1Time> for &'a Asn1TimeRef {
+impl PartialEq<Asn1Time> for &Asn1TimeRef {
     fn eq(&self, other: &Asn1Time) -> bool {
         self.diff(other)
             .map(|t| t.days == 0 && t.secs == 0)
@@ -253,7 +253,7 @@ impl PartialOrd<Asn1Time> for Asn1TimeRef {
     }
 }
 
-impl<'a> PartialOrd<Asn1Time> for &'a Asn1TimeRef {
+impl PartialOrd<Asn1Time> for &Asn1TimeRef {
     fn partial_cmp(&self, other: &Asn1Time) -> Option<Ordering> {
         self.compare(other).ok()
     }
diff --git a/boring/src/bio.rs b/boring/src/bio.rs
index a0c882a2..6566ebb8 100644
--- a/boring/src/bio.rs
+++ b/boring/src/bio.rs
@@ -9,7 +9,7 @@ use crate::error::ErrorStack;
 
 pub struct MemBioSlice<'a>(*mut ffi::BIO, PhantomData<&'a [u8]>);
 
-impl<'a> Drop for MemBioSlice<'a> {
+impl Drop for MemBioSlice<'_> {
     fn drop(&mut self) {
         unsafe {
             ffi::BIO_free_all(self.0);
diff --git a/boring/src/bn.rs b/boring/src/bn.rs
index f5384291..58edbabb 100644
--- a/boring/src/bn.rs
+++ b/boring/src/bn.rs
@@ -1012,7 +1012,7 @@ macro_rules! delegate {
     };
 }
 
-impl<'a, 'b> Add<&'b BigNumRef> for &'a BigNumRef {
+impl Add<&BigNumRef> for &BigNumRef {
     type Output = BigNum;
 
     fn add(self, oth: &BigNumRef) -> BigNum {
@@ -1024,7 +1024,7 @@ impl<'a, 'b> Add<&'b BigNumRef> for &'a BigNumRef {
 
 delegate!(Add, add);
 
-impl<'a, 'b> Sub<&'b BigNumRef> for &'a BigNumRef {
+impl Sub<&BigNumRef> for &BigNumRef {
     type Output = BigNum;
 
     fn sub(self, oth: &BigNumRef) -> BigNum {
@@ -1036,7 +1036,7 @@ impl<'a, 'b> Sub<&'b BigNumRef> for &'a BigNumRef {
 
 delegate!(Sub, sub);
 
-impl<'a, 'b> Mul<&'b BigNumRef> for &'a BigNumRef {
+impl Mul<&BigNumRef> for &BigNumRef {
     type Output = BigNum;
 
     fn mul(self, oth: &BigNumRef) -> BigNum {
@@ -1049,7 +1049,7 @@ impl<'a, 'b> Mul<&'b BigNumRef> for &'a BigNumRef {
 
 delegate!(Mul, mul);
 
-impl<'a, 'b> Div<&'b BigNumRef> for &'a BigNumRef {
+impl<'b> Div<&'b BigNumRef> for &BigNumRef {
     type Output = BigNum;
 
     fn div(self, oth: &'b BigNumRef) -> BigNum {
@@ -1062,7 +1062,7 @@ impl<'a, 'b> Div<&'b BigNumRef> for &'a BigNumRef {
 
 delegate!(Div, div);
 
-impl<'a, 'b> Rem<&'b BigNumRef> for &'a BigNumRef {
+impl<'b> Rem<&'b BigNumRef> for &BigNumRef {
     type Output = BigNum;
 
     fn rem(self, oth: &'b BigNumRef) -> BigNum {
@@ -1075,7 +1075,7 @@ impl<'a, 'b> Rem<&'b BigNumRef> for &'a BigNumRef {
 
 delegate!(Rem, rem);
 
-impl<'a> Shl<i32> for &'a BigNumRef {
+impl Shl<i32> for &BigNumRef {
     type Output = BigNum;
 
     fn shl(self, n: i32) -> BigNum {
@@ -1085,7 +1085,7 @@ impl<'a> Shl<i32> for &'a BigNumRef {
     }
 }
 
-impl<'a> Shl<i32> for &'a BigNum {
+impl Shl<i32> for &BigNum {
     type Output = BigNum;
 
     fn shl(self, n: i32) -> BigNum {
@@ -1093,7 +1093,7 @@ impl<'a> Shl<i32> for &'a BigNum {
     }
 }
 
-impl<'a> Shr<i32> for &'a BigNumRef {
+impl Shr<i32> for &BigNumRef {
     type Output = BigNum;
 
     fn shr(self, n: i32) -> BigNum {
@@ -1103,7 +1103,7 @@ impl<'a> Shr<i32> for &'a BigNumRef {
     }
 }
 
-impl<'a> Shr<i32> for &'a BigNum {
+impl Shr<i32> for &BigNum {
     type Output = BigNum;
 
     fn shr(self, n: i32) -> BigNum {
@@ -1111,7 +1111,7 @@ impl<'a> Shr<i32> for &'a BigNum {
     }
 }
 
-impl<'a> Neg for &'a BigNumRef {
+impl Neg for &BigNumRef {
     type Output = BigNum;
 
     fn neg(self) -> BigNum {
@@ -1119,7 +1119,7 @@ impl<'a> Neg for &'a BigNumRef {
     }
 }
 
-impl<'a> Neg for &'a BigNum {
+impl Neg for &BigNum {
     type Output = BigNum;
 
     fn neg(self) -> BigNum {
diff --git a/boring/src/derive.rs b/boring/src/derive.rs
index 08a47dfb..66df434f 100644
--- a/boring/src/derive.rs
+++ b/boring/src/derive.rs
@@ -11,10 +11,10 @@ use crate::{cvt, cvt_p};
 /// A type used to derive a shared secret between two keys.
 pub struct Deriver<'a>(*mut ffi::EVP_PKEY_CTX, PhantomData<&'a ()>);
 
-unsafe impl<'a> Sync for Deriver<'a> {}
-unsafe impl<'a> Send for Deriver<'a> {}
+unsafe impl Sync for Deriver<'_> {}
+unsafe impl Send for Deriver<'_> {}
 
-impl<'a> Drop for Deriver<'a> {
+impl Drop for Deriver<'_> {
     fn drop(&mut self) {
         unsafe {
             ffi::EVP_PKEY_CTX_free(self.0);
diff --git a/boring/src/sign.rs b/boring/src/sign.rs
index 5bfa2bc4..ee68bc7d 100644
--- a/boring/src/sign.rs
+++ b/boring/src/sign.rs
@@ -78,10 +78,10 @@ pub struct Signer<'a> {
     _p: PhantomData<&'a ()>,
 }
 
-unsafe impl<'a> Sync for Signer<'a> {}
-unsafe impl<'a> Send for Signer<'a> {}
+unsafe impl Sync for Signer<'_> {}
+unsafe impl Send for Signer<'_> {}
 
-impl<'a> Drop for Signer<'a> {
+impl Drop for Signer<'_> {
     fn drop(&mut self) {
         // pkey_ctx is owned by the md_ctx, so no need to explicitly free it.
         unsafe {
@@ -337,7 +337,7 @@ impl<'a> Signer<'a> {
     }
 }
 
-impl<'a> Write for Signer<'a> {
+impl Write for Signer<'_> {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
         self.update(buf)?;
         Ok(buf.len())
@@ -354,10 +354,10 @@ pub struct Verifier<'a> {
     pkey_pd: PhantomData<&'a ()>,
 }
 
-unsafe impl<'a> Sync for Verifier<'a> {}
-unsafe impl<'a> Send for Verifier<'a> {}
+unsafe impl Sync for Verifier<'_> {}
+unsafe impl Send for Verifier<'_> {}
 
-impl<'a> Drop for Verifier<'a> {
+impl Drop for Verifier<'_> {
     fn drop(&mut self) {
         // pkey_ctx is owned by the md_ctx, so no need to explicitly free it.
         unsafe {
@@ -560,7 +560,7 @@ impl<'a> Verifier<'a> {
     }
 }
 
-impl<'a> Write for Verifier<'a> {
+impl Write for Verifier<'_> {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
         self.update(buf)?;
         Ok(buf.len())
diff --git a/boring/src/ssl/bio.rs b/boring/src/ssl/bio.rs
index 04f43558..37e2866b 100644
--- a/boring/src/ssl/bio.rs
+++ b/boring/src/ssl/bio.rs
@@ -219,7 +219,7 @@ struct BIO_METHOD(*mut ffi::BIO_METHOD);
 impl BIO_METHOD {
     fn new<S: Read + Write>() -> BIO_METHOD {
         unsafe {
-            let ptr = ffi::BIO_meth_new(ffi::BIO_TYPE_NONE, b"rust\0".as_ptr() as *const _);
+            let ptr = ffi::BIO_meth_new(ffi::BIO_TYPE_NONE, b"rust\0".as_ptr().cast());
             assert!(!ptr.is_null());
             let ret = BIO_METHOD(ptr);
             assert!(ffi::BIO_meth_set_write(ptr, Some(bwrite::<S>)) != 0);
diff --git a/boring/src/stack.rs b/boring/src/stack.rs
index 67b95273..78b2773b 100644
--- a/boring/src/stack.rs
+++ b/boring/src/stack.rs
@@ -338,7 +338,7 @@ impl<'a, T: Stackable> DoubleEndedIterator for Iter<'a, T> {
     }
 }
 
-impl<'a, T: Stackable> ExactSizeIterator for Iter<'a, T> {}
+impl<T: Stackable> ExactSizeIterator for Iter<'_, T> {}
 
 /// A mutable iterator over the stack's contents.
 pub struct IterMut<'a, T: Stackable + 'a> {
@@ -372,4 +372,4 @@ impl<'a, T: Stackable> DoubleEndedIterator for IterMut<'a, T> {
     }
 }
 
-impl<'a, T: Stackable> ExactSizeIterator for IterMut<'a, T> {}
+impl<T: Stackable> ExactSizeIterator for IterMut<'_, T> {}
diff --git a/boring/src/x509/mod.rs b/boring/src/x509/mod.rs
index 3ac9b454..c09f4df8 100644
--- a/boring/src/x509/mod.rs
+++ b/boring/src/x509/mod.rs
@@ -121,7 +121,7 @@ impl X509StoreContextRef {
     {
         struct Cleanup<'a>(&'a mut X509StoreContextRef);
 
-        impl<'a> Drop for Cleanup<'a> {
+        impl Drop for Cleanup<'_> {
             fn drop(&mut self) {
                 unsafe {
                     ffi::X509_STORE_CTX_cleanup(self.0.as_ptr());
@@ -722,7 +722,7 @@ impl Stackable for X509 {
 /// A context object required to construct certain `X509` extension values.
 pub struct X509v3Context<'a>(ffi::X509V3_CTX, PhantomData<(&'a X509Ref, &'a ConfRef)>);
 
-impl<'a> X509v3Context<'a> {
+impl X509v3Context<'_> {
     pub fn as_ptr(&self) -> *mut ffi::X509V3_CTX {
         &self.0 as *const _ as *mut _
     }