The International Monetary Fund has lifted its global economic growth forecast to 3.5% this year, and expects more than 4% growth next year.
But its latest survey warns the international economy is still fragile and faces elevated risks in the months ahead.
It noted another eurozone crisis was possible and that most major economies "still face major brakes on growth".
The forecast was unveiled at the start of the annual spring meetings of the IMF and the World Bank in Washington DC.
The IMF identifies oil prices and the eurozone crisis as the main threats, and warns that the break-up of the eurozone cannot be entirely ruled out.