diff --git a/Cargo.lock b/Cargo.lock
index f70568e..e0cb267 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,100 +8,9 @@ version = "1.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08f9b8508dccb7687a1d6c4ce66b2b0ecef467c94667de27d8d7fe1f8d2a9cdc"
 
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
-[[package]]
-name = "cfg-if"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
-
-[[package]]
-name = "fastrand"
-version = "1.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3fcf0cee53519c866c09b5de1f6c56ff9d647101f81c1964fa632e148896cdf"
-dependencies = [
- "instant",
-]
-
-[[package]]
-name = "instant"
-version = "0.1.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
-dependencies = [
- "cfg-if",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.124"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21a41fed9d98f27ab1c6d161da622a4fa35e8a54a8adc24bbf3ddd0ef70b0e50"
-
-[[package]]
-name = "redox_syscall"
-version = "0.2.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62f25bc4c7e55e0b0b7a1d43fb893f4fa1361d0abe38b9ce4f323c2adfe6ef42"
-dependencies = [
- "bitflags",
-]
-
-[[package]]
-name = "remove_dir_all"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
-dependencies = [
- "winapi",
-]
-
-[[package]]
-name = "tempfile"
-version = "3.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
-dependencies = [
- "cfg-if",
- "fastrand",
- "libc",
- "redox_syscall",
- "remove_dir_all",
- "winapi",
-]
-
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
 [[package]]
 name = "wwise_fix"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "tempfile",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index ca5f7b5..93b59d3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,4 +7,3 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.57"
-tempfile = "3.3.0"
diff --git a/src/main.rs b/src/main.rs
index 1b4c4cf..8074c04 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,13 +1,11 @@
-use anyhow::bail;
 use anyhow::Context;
 use anyhow::Result;
-use tempfile::NamedTempFile;
 
 use std::env;
 use std::ffi::{OsStr, OsString};
 use std::fs;
 use std::fs::File;
-use std::io::{self, Read, Seek, SeekFrom, Write};
+use std::io::{Seek, SeekFrom, Write};
 use std::path::Path;
 
 // Offset within the bank file to the version number within the BKHD section.
@@ -20,45 +18,12 @@ fn fix_file<P>(path: P) -> Result<()>
 where
     P: AsRef<Path>,
 {
-    let tmp_path = {
-        let mut f = File::open(&path).with_context(|| "failed to open sound bank file")?;
-        let mut tmp = NamedTempFile::new().with_context(|| "failed to open temporary file")?;
+    let mut f = File::open(&path).with_context(|| "failed to open sound bank file")?;
 
-        // Copy everything until the version number
-        io::copy(
-            &mut std::io::Read::by_ref(&mut f).take(OFFSET_VERSION_NUMBER),
-            &mut tmp,
-        )
-        .with_context(|| "failed to copy to tempfile")?;
-
-        // Write the hard coded version number
-        tmp.write(&BANK_VERSION)
-            .with_context(|| "failed to write version number")?;
-
-        // Copy the rest of the file
-        f.seek(SeekFrom::Start(OFFSET_VERSION_NUMBER + 4))
-            .with_context(|| "failed to skip to rest of content")?;
-        io::copy(&mut f, &mut tmp).with_context(|| "failed to copy to tempfile")?;
-        tmp.into_temp_path()
-    };
-
-    if let Err(_) = fs::rename(&tmp_path, &path) {
-        // Attempt manual copy-and-delete
-        let mut tmp = File::open(&tmp_path).with_context(|| "failed to open tempfile for reading")?;
-        let mut f = File::open(&path).with_context(|| "failed to open destination file")?;
-        if let Err(err) = io::copy(&mut tmp, &mut f) {
-            let tmp_path = tmp_path
-                .keep()
-                .with_context(|| "failed to persist temporary file")?;
-            bail!(
-                "failed to rename or move temporary file to override the sound bank: {}!\n\
-                Please manually move the file from {} to {}.",
-                err,
-                tmp_path.display(),
-                path.as_ref().display()
-            );
-        }
-    }
+    f.seek(SeekFrom::Start(OFFSET_VERSION_NUMBER))
+        .with_context(|| "failed to seek to version number offset")?;
+    f.write(&BANK_VERSION)
+        .with_context(|| "failed to write version number")?;
 
     Ok(())
 }