diff --git a/initrd_maker.rs b/initrd_maker.rs
index 9704e4f..458e59d 100644
--- a/initrd_maker.rs
+++ b/initrd_maker.rs
@@ -15,16 +15,16 @@ fn main() {
         let file_name = file_path.file_name().unwrap();
         let file_name_len =
             u16::try_from(file_name.len()).expect("File name length greater than 256 bytes");
-        if file_name_len > MAX_NAME_LEN {
-            panic!(
-                "File {:?} has name longer than {} bytes",
-                file_name, MAX_NAME_LEN
-            );
-        }
+        assert!(
+            file_name_len <= MAX_NAME_LEN,
+            "File {:?} has name longer than {} bytes",
+            file_name,
+            MAX_NAME_LEN
+        );
         let mut file = File::open(file_path).expect("File did not exist");
         let length = u16::try_from(file.metadata().expect("Could not get file metadata").len())
             .expect("File size greater than 64 KiB");
-        let file_num_blocks = (length / BLOCK_SIZE) + if length % BLOCK_SIZE != 0 { 1 } else { 0 };
+        let file_num_blocks = (length / BLOCK_SIZE) + if length % BLOCK_SIZE == 0 { 0 } else { 1 };
         let mut header_block = Vec::new();
         header_block.extend_from_slice(&length.to_be_bytes());
         header_block.extend_from_slice(&file_num_blocks.to_be_bytes());
@@ -35,10 +35,11 @@ fn main() {
         archive
             .write_all(&header_block)
             .expect("Could not write to initrd");
-        let bytes_written =
-            io::copy(&mut file, &mut archive).expect("Could not read from file/write to initrd");
-        if (bytes_written as u16 % BLOCK_SIZE) != 0 {
-            let bytes_padding = (BLOCK_SIZE) - (bytes_written as u16 % BLOCK_SIZE);
+        #[allow(clippy::cast_possible_truncation)]
+        let bytes_written = io::copy(&mut file, &mut archive)
+            .expect("Could not read from file/write to initrd") as u16;
+        if (bytes_written % BLOCK_SIZE) != 0 {
+            let bytes_padding = (BLOCK_SIZE) - (bytes_written % BLOCK_SIZE);
             for _ in 0..bytes_padding {
                 archive.write_all(&[0]).expect("Could not write to initrd");
             }