At Klarna we handle customers data with utmost care since we believe protecting data is one of the most basic obligations of any companies. Achieving our goal requires more effort since the Erlang ecosystem was designed for private networks where the concern about malicious users performing attacks was not given relevance. Therefore, every day we put our security hat on to develop and review code changes going into production. In this paper, we show the challenges that today’s Erlang systems are faced with and explain why all Erlang developers and operators must have the security aware mindset.