diff --git a/README.md b/README.md
index 4f4223b1a..1daddc5f0 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 
 [![Build Status](https://travis-ci.org/rustwasm/wasm-bindgen.svg?branch=master)](https://travis-ci.org/rustwasm/wasm-bindgen)
 [![Build status](https://ci.appveyor.com/api/projects/status/559c0lj5oh271u4c?svg=true)](https://ci.appveyor.com/project/alexcrichton/wasm-bindgen)
-[![](http://meritbadge.herokuapp.com/wasm-bindgen)](https://crates.io/crates/wasm-bindgen)
+[![](https://meritbadge.herokuapp.com/wasm-bindgen)](https://crates.io/crates/wasm-bindgen)
 [![](https://img.shields.io/crates/d/wasm-bindgen.svg)](https://crates.io/crates/wasm-bindgen)
 [![API Documentation on docs.rs](https://docs.rs/wasm-bindgen/badge.svg)](https://docs.rs/wasm-bindgen)