diff --git a/api/api.go b/api/api.go
index 2ab33b3..59ebbe9 100644
--- a/api/api.go
+++ b/api/api.go
@@ -2,7 +2,6 @@ package api
 
 import (
 	"bytes"
-	"compress/gzip"
 	"errors"
 	"fmt"
 	"io"
@@ -75,8 +74,7 @@ func (a *AsciinemaAPI) urlForUpload() string {
 
 func (a *AsciinemaAPI) headersForUpload() map[string]string {
 	return map[string]string{
-		"User-Agent":       fmt.Sprintf("asciinema/%s %s/%s %s-%s", a.version, runtime.Compiler, runtime.Version(), runtime.GOOS, runtime.GOARCH),
-		"Content-Encoding": "gzip",
+		"User-Agent": fmt.Sprintf("asciinema/%s %s/%s %s-%s", a.version, runtime.Compiler, runtime.Version(), runtime.GOOS, runtime.GOARCH),
 	}
 }
 
@@ -86,12 +84,7 @@ func filesForUpload(path string) (map[string]io.ReadCloser, error) {
 		return nil, err
 	}
 
-	zippedFile, err := gzip.NewReader(file)
-	if err != nil {
-		return nil, err
-	}
-
-	return map[string]io.ReadCloser{"asciicast:asciicast.json": zippedFile}, nil
+	return map[string]io.ReadCloser{"asciicast:asciicast.json": file}, nil
 }
 
 func extractWarningMessage(response *http.Response) string {