diff --git a/Formula/gts.rb b/Formula/gts.rb
index 3826fae509..2175b34a1e 100644
--- a/Formula/gts.rb
+++ b/Formula/gts.rb
@@ -1,6 +1,6 @@
 class Gts < Formula
   desc "GNU triangulated surface library"
-  homepage "http://gts.sourceforge.net/"
+  homepage "https://gts.sourceforge.io/"
   url "https://downloads.sourceforge.net/project/gts/gts/0.7.6/gts-0.7.6.tar.gz"
   sha256 "059c3e13e3e3b796d775ec9f96abdce8f2b3b5144df8514eda0cc12e13e8b81e"