diff --git a/README.md b/README.md
index 56f959b..d94895c 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ The `strength_reduce` crate requires rustc 1.26 or greater.
 Licensed under either of
 
  * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
- * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or https://opensource.org/licenses/MIT)
 
 at your option.