diff --git a/Gemfile b/Gemfile
index eceae06..3981ad6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,4 @@
 source "https://rubygems.org"
 
 gem "jekyll"
+gem "stringex"
diff --git a/Rakefile.rb b/Rakefile.rb
index 72586b1..e56eb53 100644
--- a/Rakefile.rb
+++ b/Rakefile.rb
@@ -38,7 +38,8 @@
     else
         post.puts "title: "
     end
-    post.puts "modified: #{Time.now.strftime('%Y-%m-%d %H:%M:%S %z')}"
+    post.puts "date: #{Time.now.strftime('%Y-%m-%d %H:%M:%S %z')}"
+    post.puts "categories: talk"
     post.puts "---"
   end
 end