diff --git a/process_kill.gemspec b/process_kill.gemspec
index 5ab6f8e..6b80322 100644
--- a/process_kill.gemspec
+++ b/process_kill.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   # Prevent pushing this gem to RubyGems.org by setting 'allowed_push_host', or
   # delete this section to allow pushing this gem to any host.
   if spec.respond_to?(:metadata)
-    spec.metadata['allowed_push_host'] = 'http://rubygems.org'
+    spec.metadata['allowed_push_host'] = 'https://rubygems.org'
   else
     raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
   end