diff --git a/Casks/selflanguage-self-control.rb b/Casks/selflanguage-self-control.rb
index 898ca1e1a7..d9d5f35e39 100644
--- a/Casks/selflanguage-self-control.rb
+++ b/Casks/selflanguage-self-control.rb
@@ -2,7 +2,7 @@ cask :v1 => 'selflanguage-self-control' do
   version '4.5.0'
   sha256 'fa5edc50ec517c06547e8c57246075f1fcd4ad98b5b9c681b9a60e357f4d3f04'
 
-  url "http://files.selflanguage.org/releases/#{version.gsub(/\.\d$/, '')}/Self-#{version}.dmg"
+  url "http://files.selflanguage.org/releases/#{version.sub(/\.\d+$/, '')}/Self-#{version}.dmg"
   homepage 'http://selflanguage.org/'
   license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder