diff --git a/Casks/r/realforce.rb b/Casks/r/realforce.rb
index 3a329d0ffe..b0c2a42266 100644
--- a/Casks/r/realforce.rb
+++ b/Casks/r/realforce.rb
@@ -8,7 +8,7 @@ cask "realforce" do
   homepage "https://www.realforce.co.jp/"
 
   livecheck do
-    url "https://www.realforce.co.jp/support/download/software"
+    url "https://www.realforce.co.jp/support/download/software/"
     regex(%r{href=.*?/REALFORCE\s*?CONNECT\s*?Software[._-](\d+(?:-\d+)+)\.pkg})
     strategy :page_match do |page, regex|
       page.scan(regex).map { |match| match[0].tr("-", ".").to_s }