diff --git a/bin/rtmr-calc/src/main.rs b/bin/rtmr-calc/src/main.rs
index a3ab72c..d104e82 100644
--- a/bin/rtmr-calc/src/main.rs
+++ b/bin/rtmr-calc/src/main.rs
@@ -129,7 +129,7 @@ fn main() -> Result<()> {
     let _ = device.seek(SeekFrom::Start(pstart))?;
 
     assert_eq!(header.part_size, 128);
-    assert!(header.num_parts < u8::MAX as _);
+    assert!(header.num_parts < u32::from(u8::MAX));
 
     let empty_bytes = [0u8; 128];
 
@@ -177,8 +177,8 @@ fn main() -> Result<()> {
             .find(|s| s.name().unwrap().eq(sect))
             .ok_or(anyhow!("Failed to find section `{sect}`"))?;
 
-        let mut start = s.pointer_to_raw_data as u64;
-        let end = start + s.virtual_size as u64;
+        let mut start = u64::from(s.pointer_to_raw_data);
+        let end = start + u64::from(s.virtual_size);
 
         debug!(sect, start, end, len = (s.virtual_size));
 
diff --git a/crates/teepot/src/ethereum/mod.rs b/crates/teepot/src/ethereum/mod.rs
index 637565a..12dbe11 100644
--- a/crates/teepot/src/ethereum/mod.rs
+++ b/crates/teepot/src/ethereum/mod.rs
@@ -15,7 +15,7 @@ use sha3::{Digest, Keccak256};
 pub fn recover_signer(sig: &[u8; 65], root_hash: &Message) -> Result<[u8; 20]> {
     let sig = RecoverableSignature::from_compact(
         &sig[0..64],
-        RecoveryId::try_from(sig[64] as i32 - 27)?,
+        RecoveryId::try_from(i32::from(sig[64]) - 27)?,
     )?;
     let public = SECP256K1.recover_ecdsa(root_hash, &sig)?;
     Ok(public_key_to_ethereum_address(&public))