diff --git a/src/http.rs b/src/http.rs
index 1fda060..c35ef25 100644
--- a/src/http.rs
+++ b/src/http.rs
@@ -171,6 +171,7 @@ impl Content {
 			"3gp" => "video/3gpp",
 			"3gp2" => "video/3gpp2",
 			"avi" => "video/x-msvideo",
+			"mkv" => "video/mkv",
 			"mov" => "video/mov",
 			"mp4" => "video/mp4",
 			"mpeg" => "video/mpeg",