"Ukraine's non-aligned status has failed to guarantee our integrity, so I have taken the decision to return Ukraine to the course towards integration with NATO," Poroshenko said addressing Polish lawmakers in Warsaw.
"We are already working to strengthen our cooperation with NATO, and we have a lot of work ahead of us to meet NATO membership standards," the president added.
In 2010, Ukraine's then-president Viktor Yanukovych signed a law outlining the country's non-aligned status. In August, Ukrainian authorities introduced a bill to abolish the country's non-aligned status and put the country back on track to join NATO.
Earlier this year, Russian Foreign Minister Sergei Lavrov said that Ukraine's non-aligned status is in the best interests of the Ukrainian people, the country's neighboring states and European security in general. He also pointed out that the issue was a matter of principle for Russia.