Sri Lanka is the first country against which a foreign investor has had recourse to international arbitration based on the dispute settlement clause in a bilateral investment treaty (BIT). This was the case of AAPL v. Sri Lanka. Since then, the country has been challenged twice before the International Centre for Settlement of Investment Disputes (ICSID), while its latest encounter was in the case of Deutsche Bank AG v. Sri Lanka. In the intervening years between these two cases, Sri Lanka maintained silence and failed to alter its BITs in a global context where the conventional attitude on international investment agreements (IIAs) is being increasingly reconsidered. This paper provides an overview of Sri Lanka’s BITs, which highlights the urgency of reconsidering the country’s investment treaty-making practice. It suggests some modifications to align the country’s investment treaty-making practice with international investment law (IIL) developments.