diff --git a/Casks/riffworkst4.rb b/Casks/riffworkst4.rb
index 04b2df995..368ac4a64 100644
--- a/Casks/riffworkst4.rb
+++ b/Casks/riffworkst4.rb
@@ -1,6 +1,6 @@
 class Riffworkst4 < Cask
   # note: "4" is not a version number, but an intrinsic part of product name "T4"
-  url 'http://www.sonomawireworks.com/accountManagerUI/files/RiffWorksT4.dmg'
+  url 'https://www.sonomawireworks.com/accountManagerUI/files/RiffWorksT4.dmg'
   homepage 'http://www.sonomawireworks.com/T4/'
   version '2.6'
   sha256 '83c51fa4a08ad19f92418572e11b09ebb33f9a0341ff9e0173d0eb0c7709cddb'