diff --git a/lib/emacscollab/database/sqlite.rb b/lib/emacscollab/database/sqlite.rb
index d57b6c8..6b2413a 100644
--- a/lib/emacscollab/database/sqlite.rb
+++ b/lib/emacscollab/database/sqlite.rb
@@ -3,7 +3,6 @@ require_relative '../project'
 require_relative '../sshkey'
 
 require 'sqlite3'
-require 'json'
 
 module EmacsCollab
   module Database
@@ -46,7 +45,7 @@ module EmacsCollab
 
       def update_user(user)
         @db.execute("UPDATE Users SET keys = ? WHERE name = ?",
-                    [JSON.generate(user.keys),user.id])
+                    [Marshal.dump(user.keys),user.id])
       end
       
       def change_user_password(user,hash,salt)