diff --git a/src/response.rs b/src/response.rs
index a0fe15e..4efb520 100644
--- a/src/response.rs
+++ b/src/response.rs
@@ -288,7 +288,7 @@ impl Response {
     /// assert_eq!(bytes.len(), len);
     /// # }
     /// ```
-    pub fn into_reader(self) -> impl Read + Send + Sync {
+    pub fn into_reader(self) -> impl Read + Send {
         //
         let is_http10 = self.http_version().eq_ignore_ascii_case("HTTP/1.0");
         let is_close = self
@@ -327,7 +327,7 @@ impl Response {
 
         match (use_chunked, limit_bytes) {
             (true, _) => Box::new(PoolReturnRead::new(unit, ChunkDecoder::new(stream)))
-                as Box<dyn Read + Send + Sync>,
+                as Box<dyn Read + Send>,
             (false, Some(len)) => {
                 Box::new(PoolReturnRead::new(unit, LimitedRead::new(stream, len)))
             }