diff --git a/Cargo.toml b/Cargo.toml
index 5b564ec9..80973481 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ authors = [
     "Michael-F-Bryan <michaelfbryan@gmail.com>",
     "Matt Ickstadt <mattico8@gmail.com>"
 ]
-documentation = "http://rust-lang.github.io/mdBook/index.html"
+documentation = "https://rust-lang.github.io/mdBook/index.html"
 edition = "2021"
 exclude = ["/guide/*"]
 keywords = ["book", "gitbook", "rustbook", "markdown"]