diff --git a/Library/Homebrew/dev-cmd/bump-unversioned-casks.rb b/Library/Homebrew/dev-cmd/bump-unversioned-casks.rb
index a65d134fd4..3c45daedbd 100644
--- a/Library/Homebrew/dev-cmd/bump-unversioned-casks.rb
+++ b/Library/Homebrew/dev-cmd/bump-unversioned-casks.rb
@@ -261,11 +261,15 @@ module Homebrew
     version_match = version&.match?(/\A\d+(\.\d+)+\Z/)
 
     if short_version_match && version_match
-      return version if version.length > short_version.length && version.start_with?(short_version)
-      return short_version if short_version.length > version.length && short_version.start_with?(version)
+      return version if version.length > short_version.length && version.start_with?("#{short_version}.")
+      return short_version if short_version.length > version.length && short_version.start_with?("#{version}.")
     end
 
-    return "#{short_version},#{version}" if short_version&.match?(/\A\d+(\.\d+)*\Z/) && version&.match?(/\A\d+\Z/)
+    if short_version&.match?(/\A\d+(\.\d+)*\Z/) && version&.match?(/\A\d+\Z/)
+      return short_version if short_version.start_with?("#{version}.")
+
+      return "#{short_version},#{version}"
+    end
 
     short_version || version
   end
diff --git a/Library/Homebrew/test/dev-cmd/bump-unversioned-casks_spec.rb b/Library/Homebrew/test/dev-cmd/bump-unversioned-casks_spec.rb
index bd6d76dd79..e5929cb9e4 100644
--- a/Library/Homebrew/test/dev-cmd/bump-unversioned-casks_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/bump-unversioned-casks_spec.rb
@@ -16,6 +16,7 @@ describe "Homebrew.bump_unversioned_casks_args" do
       ["1.2.3", "1.2"]  => "1.2.3",
       ["1.2.3", "8312"] => "1.2.3,8312",
       ["2021", "2006"]  => "2021,2006",
+      ["1.0", "1"]      => "1.0",
     }
 
     expected_mappings.each do |(short_version, version), expected_version|