diff --git a/app/models/diploma.rb b/app/models/diploma.rb
index 82b7d2e..eab8cf6 100644
--- a/app/models/diploma.rb
+++ b/app/models/diploma.rb
@@ -34,7 +34,7 @@ class Diploma
   end
 
   def slug_title
-    self.school_name+' '+self.department+' '+self.degree
+    [self.school_name,self.department,self.degree].join(' ')
   end
 
   protected