diff --git a/README.md b/README.md
index b6ce8fc..8961fac 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,6 @@ This work is licensed under a
 
 [![CC BY 4.0][cc-by-image]][cc-by]
 
-[cc-by]: http://creativecommons.org/licenses/by/4.0/
+[cc-by]: https://creativecommons.org/licenses/by/4.0/
 [cc-by-image]: https://i.creativecommons.org/l/by/4.0/88x31.png
 [cc-by-shield]: https://img.shields.io/badge/License-CC%20BY%204.0-lightgrey.svg
\ No newline at end of file