diff --git a/Library/Homebrew/dev-cmd/bump-formula-pr.rb b/Library/Homebrew/dev-cmd/bump-formula-pr.rb
index d997d41529..e3ee26291c 100644
--- a/Library/Homebrew/dev-cmd/bump-formula-pr.rb
+++ b/Library/Homebrew/dev-cmd/bump-formula-pr.rb
@@ -346,7 +346,7 @@ module Homebrew
       EOS
     end
 
-    if new_url =~ %r{^https://github.com/([\w-]+)/([\w-]+)/archive/refs/tags/(v?[.0-9]*)\.tar}
+    if new_url =~ %r{^https://github\.com/([\w-]+)/([\w-]+)/archive/refs/tags/(v?[.0-9]+)\.tar\.}
       owner = Regexp.last_match(1)
       repo = Regexp.last_match(2)
       tag = Regexp.last_match(3)