diff --git a/src/ttmp_extractor.rs b/src/ttmp_extractor.rs
index c777379..8ea9a65 100644
--- a/src/ttmp_extractor.rs
+++ b/src/ttmp_extractor.rs
@@ -15,10 +15,10 @@ use crate::tracking_reader::TrackingReader;
 use crate::util::{MAX_MODEL_LODS, read_struct};
 
 #[doc(hidden)]
-pub trait WriteSeek: Write + Seek + Read {}
+pub trait WriteSeek: Write + Seek {}
 
 impl<T> WriteSeek for T
-    where T: Write + Seek + Read {}
+    where T: Write + Seek {}
 
 pub struct TtmpExtractor<R> {
     manifest: ManifestKind,
@@ -128,7 +128,7 @@ impl<R: Read + Seek> TtmpExtractor<R> {
 }
 
 impl<R: Read> TtmpExtractor<R> {
-    pub fn extract_one_into<W: Read + Write + Seek>(mod_file: &ModFile, mut reader: R, mut writer: W) -> Result<()> {
+    pub fn extract_one_into<W: Write + Seek>(mod_file: &ModFile, mut reader: R, mut writer: W) -> Result<()> {
         let mut reader = TrackingReader::new(&mut reader);
         let mut buf = [0; 4096];
         let file = mod_file.file;
@@ -175,7 +175,7 @@ impl<R: Read> TtmpExtractor<R> {
         Ok(())
     }
 
-    fn extract_model_file<T: Read, W: Read + Write + Seek>(info: &SqPackFileInfoHeader, mut reader: T, mut writer: W, buf: &mut [u8]) -> Result<()> {
+    fn extract_model_file<T: Read, W: Write + Seek>(info: &SqPackFileInfoHeader, mut reader: T, mut writer: W, buf: &mut [u8]) -> Result<()> {
         let model_info: ModelBlock = read_struct(&mut reader, buf)?;
 
         let block_counts = &model_info.block_num;