diff --git a/Cargo.toml b/Cargo.toml
index 6bfaf6e..0425935 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.6.0"
 authors = ["Lucas L. Treffenstädt <lucas@treffenstaedt.de>", "Alex Whitney <adwhit@fastmail.com>"]
 description = "Wrapper for the nlopt library"
 license = "MIT"
-repository = "http://github.com/adwhit/rust-nlopt"
+repository = "https://github.com/adwhit/rust-nlopt"
 readme = "README.md"
 keywords = ["nonlinear", "optimization", "lbfgs", "bobyqa"]
 categories = ["science", "algorithms"]