diff --git a/castor/castor.rb b/castor/castor.rb
index 2a2b368..99c9c48 100755
--- a/castor/castor.rb
+++ b/castor/castor.rb
@@ -54,7 +54,8 @@ def self.tidy(text)
 end
 
 
-if (1 + rand(4) == 4)
+probability = 4
+if (rand(9) > probability)
   Castor::taller
 else
   puts "[castor] Going back to sleep..."
diff --git a/pollux/pollux.rb b/pollux/pollux.rb
index 97e39cd..f861b14 100755
--- a/pollux/pollux.rb
+++ b/pollux/pollux.rb
@@ -54,7 +54,8 @@ def self.tidy(text)
 end
 
 
-if (1 + rand(4) == 4)
+probability = 6
+if (rand(9) > probability)
   Pollux::taller
 else
   puts "[pollux] Going back to sleep..."