Rakefile in slideshow-1.2.0.beta3 vs Rakefile in slideshow-1.2.0.beta4

@@ -15,10 +15,11 @@
   self.extra_deps = [
     ['RedCloth','>= 4.2.9'],
     ['markdown','>= 0.4.0'],
     ['textutils','>= 0.2.0'],
     ['props','>= 0.2.0'],
-    ['pakman','>= 0.1.0']
+    ['pakman','>= 0.2.0'],
+    ['activesupport', '>= 3.2.6']
   ]
     
   # switch extension to .markdown for gihub formatting
   self.readme_file  = 'README.markdown'
   self.history_file = 'History.markdown'
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