diff --git a/save_cache.go b/save_cache.go
index 52ddeab..aec5ea1 100644
--- a/save_cache.go
+++ b/save_cache.go
@@ -124,8 +124,7 @@ func (r *cache) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 			http.Error(w, "server error", http.StatusInternalServerError)
 			return
 		}
-		buf := [8 * 1024 * 1024]byte{}
-		_, err = io.CopyBuffer(file, req.Body, buf[:])
+		_, err = io.Copy(file, req.Body)
 		if err != nil {
 			log.Printf("io.Copy: %w", err)
 			http.Error(w, "server error", http.StatusInternalServerError)
@@ -143,8 +142,7 @@ func (r *cache) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 			http.Error(w, "server error", http.StatusInternalServerError)
 			return
 		}
-		buf := [8 * 1024 * 1024]byte{}
-		_, err = io.CopyBuffer(w, file, buf[:])
+		_, err = io.Copy(w, file)
 		if err != nil {
 			log.Printf("io.Copy: %w", err)
 			http.Error(w, "server error", http.StatusInternalServerError)