README: try to fix the coverage badge
diff --git a/README.md b/README.md
index 2bc0381..4a0849b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# HttpRouter [](https://travis-ci.org/julienschmidt/httprouter) [](http://gocover.io/github.com/julienschmidt/httprouter) [](http://godoc.org/github.com/julienschmidt/httprouter)
+# HttpRouter [](https://travis-ci.org/julienschmidt/httprouter) [](https://gocover.io/github.com/julienschmidt/httprouter) [](http://godoc.org/github.com/julienschmidt/httprouter)
HttpRouter is a lightweight high performance HTTP request router (also called *multiplexer* or just *mux* for short) for [Go](https://golang.org/).