diff --git a/tasks/doc.rake b/tasks/doc.rake
index 63891c8..79cf21e 100644
--- a/tasks/doc.rake
+++ b/tasks/doc.rake
@@ -13,6 +13,19 @@ task :viewpdf => :pdf do
   sh 'xdg-open', 'docs/_build/latex/softwarepublico.pdf'
 end
 
+desc 'Publishes PDF'
+task :pdfupload => :pdf do
+  require 'date'
+
+  tag = Date.today.strftime('doc-%Y-%m-%d')
+  blob = `git hash-object -w docs/_build/latex/softwarepublico.pdf`.strip
+  tree = `printf '100644 blob #{blob}\tsoftwarepublico.pdf\n' | git mktree`.strip
+  commit = `git commit-tree -m #{tag} #{tree}`.strip
+
+  sh 'git', 'tag', tag, commit
+  sh 'git', 'push'
+end
+
 desc 'Removes generated files'
 task :clean do
   sh 'make -C docs/ clean'
--
libgit2 0.21.2