Lithuania's faster-than-projected economic growth has put the country at risk of falling short of the goal.
Nauseda, Finance Minister Gintare Skaiste and Deputy Defense Minister Zilvinas Tomkus agreed to increase defense spending by 20.5 million euros to bring it to 2.03 percent of GDP, the president's office said in a press release.
Skaiste signed a respective decree on Thursday, it said.
Lithuania's budget law allows the Finance Ministry to borrow funds to ensure that defense spending does not fall below 2 percent of GDP.
Based on the Organization for Economic Cooperation and Development's 2021 forecasts published in May, the Lithuanian economy is expected to grow faster than earlier projected, meaning that the country's defense spending relative to GDP would be lower, at 1.99 percent.
Before the increase, Lithuania's 2021 defense budget totalled almost 1.028 billion euros.