Venezuela's government announced on Friday that is devaluing the country's currency, a change expected to push up prices in the heavily import-reliant economy.

Officials said the fixed exchange rate is changing from 4.30 bolivars to the dollar to 6.30 bolivars to the dollar.

The devaluation had been widely expected by analysts in recent months. It was the first devaluation to be announced by President Hugo Chávez's government since 2010.

Planning and finance minister Jorge Giordani said the new rate takes effect immediately, though the old rate would still be allowed for some transactions that were already approved by the state currency agency.

Venezuela's government has had strict currency exchange controls since 2003 and maintains a fixed, government-set exchange rate.

Under the currency controls, people and businesses must apply to a government currency agency to receive dollars at the official rate to import goods, pay for travel or cover other obligations.

While those controls have restricted the amounts of dollars available at the official rate, an illegal black market has flourished and the value of the bolivar has recently been eroding. In black market trading, dollars have recently been selling for more than four times the official exchange rate of 4.30 bolivars to the dollar.