The dollar index, which measures the greenback against six major peers, increased 0.98 percent at 97.1380.
In late New York trading, the euro fell to 1.1189 U.S. dollars from 1.1312 dollars in the previous session, and the British pound decreased to 1.3387 dollars from 1.3536 U.S. dollars in the previous session. The Australian dollar decreased to 0.7158 U.S. dollar from 0.7236 dollar.
The U.S. dollar bought 115.63 Japanese yen, higher than 114.97 Japanese yen of the previous session. The U.S. dollar rose to 0.9257 Swiss franc from 0.9182 Swiss franc, and it rose to 1.2814 Canadian dollars from 1.2738 Canadian dollars.
Traders anxiously eyed updates regarding the Ukraine crisis.
Russian President Vladimir Putin on Thursday authorized "a special military operation" in Donbass, and Ukraine confirmed that military targets across the country were under attack.
"Military action fuels risk aversion," Antje Praefcke, FX analyst at Commerzbank, said Thursday in note.
"For the currency market, this means that the safe havens, especially the CHF (Swiss franc) and USD, will remain in demand and are unlikely to lose much ground," she said.
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