diff --git a/README.md b/README.md
index 6a4c4ae..f2df52f 100644
--- a/README.md
+++ b/README.md
@@ -78,4 +78,4 @@ set.insert(2);
 
 [chongo]: http://www.isthe.com/chongo/tech/comp/fnv/index.html
 [faq]: https://www.rust-lang.org/en-US/faq.html#why-are-rusts-hashmaps-slow
-[graphs]: http://cglab.ca/~abeinges/blah/hash-rs/
+[graphs]: https://cglab.ca/~abeinges/blah/hash-rs/
diff --git a/lib.rs b/lib.rs
index eaf3d44..5965797 100644
--- a/lib.rs
+++ b/lib.rs
@@ -62,7 +62,7 @@
 //!
 //! [chongo]: http://www.isthe.com/chongo/tech/comp/fnv/index.html
 //! [faq]: https://www.rust-lang.org/en-US/faq.html#why-are-rusts-hashmaps-slow
-//! [graphs]: http://cglab.ca/~abeinges/blah/hash-rs/
+//! [graphs]: https://cglab.ca/~abeinges/blah/hash-rs/
 
 
 use std::default::Default;