diff --git a/readme.md b/readme.md
index 92ef2fe..38a1d2b 100644
--- a/readme.md
+++ b/readme.md
@@ -1566,7 +1566,7 @@ premium services
 Contributions welcome! Read the [contribution guidelines](contributing.md) first.
 
 ## License
-[![CC0](http://mirrors.creativecommons.org/presskit/buttons/88x31/svg/cc-zero.svg)](http://creativecommons.org/publicdomain/zero/1.0)
+[![CC0](https://mirrors.creativecommons.org/presskit/buttons/88x31/svg/cc-zero.svg)](https://creativecommons.org/publicdomain/zero/1.0/)
 
 To the extent possible under law, Igglybuff has waived all copyright and
 related or neighboring rights to this work.