diff --git a/README.md b/README.md
index 63d8431..6ab17c8 100644
--- a/README.md
+++ b/README.md
@@ -8,5 +8,5 @@
 ## License
 
 Dual-licensed under the Creative Commons Zero 1.0 Universal
-([`COPYING`](COPYING)) or [Unlicense](http://unlicense.org)
+([`COPYING`](COPYING)) or [Unlicense](https://unlicense.org)
 ([`LICENSE`](LICENSE)).