diff --git a/lib/open_food_network/locking.rb b/lib/open_food_network/locking.rb
index 8c24256bf3..30dec63b0b 100644
--- a/lib/open_food_network/locking.rb
+++ b/lib/open_food_network/locking.rb
@@ -2,7 +2,7 @@ module OpenFoodNetwork::Locking
   # http://rhnh.net/2010/06/30/acts-as-list-will-break-in-production
   def with_isolation_level_serializable
     self.transaction do
-      self.connection.execute("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE")
+      self.connection.execute "SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL SERIALIZABLE"
       yield
     end
   end