1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index dffdaa9dc..bc5e0f76d 100644
--- a/README.md
+++ b/README.md
@@ -255,7 +255,7 @@ which means you can modify it, redistribute it or use it however you like.
                                      128K (default 5)
     --recode-video FORMAT            Encode the video to another format if
                                      necessary (currently supported:
-                                     mp4|flv|ogg|webm)
+                                     mp4|flv|ogg|webm|mkv)
     -k, --keep-video                 keeps the video file on disk after the
                                      post-processing; the video is erased by
                                      default