wisper.gemspec in wisper-2.0.0 vs wisper.gemspec in wisper-2.0.1

@@ -15,10 +15,10 @@
   DESC
   gem.summary       = "A micro library providing objects with Publish-Subscribe capabilities"
   gem.homepage      = "https://github.com/krisleech/wisper"
   gem.license       = "MIT"
 
-  signing_key = File.expand_path('~/.ssh/gem-private_key.pem')
+  signing_key = File.expand_path(ENV['HOME'].to_s + '/.ssh/gem-private_key.pem')
 
   if File.exist?(signing_key)
     gem.signing_key = signing_key
     gem.cert_chain  = ['gem-public_cert.pem']
   end