diff --git a/src/common.rs b/src/common.rs
index b44cf39..e38385e 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -252,7 +252,7 @@ pub(crate) fn chownroot(path: String) -> Result<String> {
         }
 
         // change directory owner to root
-        if libc::chown(path.as_bytes().as_ptr() as *const i8, 0, 0) != 0 {
+        if libc::chown(path.as_bytes().as_ptr() as *const _, 0, 0) != 0 {
             error!("Failed to change file {} owner.", path);
             return Err(Error::Permission);
         }
diff --git a/src/main.rs b/src/main.rs
index 4631836..d7598d7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,7 +18,7 @@
     missing_copy_implementations,
     missing_debug_implementations,
     missing_docs,
-    trivial_casts,
+    //trivial_casts,
     trivial_numeric_casts,
     unused_allocation,
     unused_comparisons,
diff --git a/src/tpm.rs b/src/tpm.rs
index f6ae1bb..dbcc848 100644
--- a/src/tpm.rs
+++ b/src/tpm.rs
@@ -117,12 +117,12 @@ pub(crate) fn create_ek(
 
 fn unmarshal_tpms_attest(val: &[u8]) -> Result<TPMS_ATTEST> {
     let mut resp = TPMS_ATTEST::default();
-    let mut offset = 0u64;
+    let mut offset = 0;
 
     unsafe {
         let res = Tss2_MU_TPMS_ATTEST_Unmarshal(
             val[..].as_ptr(),
-            val.len() as u64,
+            val.len() as _,
             &mut offset,
             &mut resp,
         );
@@ -140,7 +140,7 @@ fn unmarshal_tpms_attest(val: &[u8]) -> Result<TPMS_ATTEST> {
 macro_rules! create_marshal_fn {
     ($func:ident, $tpmobj:ty, $marshal:ident) => {
         fn $func(t: $tpmobj) -> Vec<u8> {
-            let mut offset = 0u64;
+            let mut offset = 0;
             let size = std::mem::size_of::<$tpmobj>();
 
             let mut tpm_vec = Vec::with_capacity(size);
@@ -148,7 +148,7 @@ macro_rules! create_marshal_fn {
                 let res = $marshal(
                     &t,
                     tpm_vec.as_mut_ptr(),
-                    tpm_vec.capacity() as u64,
+                    tpm_vec.capacity() as _,
                     &mut offset,
                 );
                 if res != 0 {