Britain and Ukraine have signed a bilateral agreement to support Kyiv’s sovereignty and territorial integrity in the face of Russia’s “malign influence,” British Prime Minister Boris Johnson’s office says.

The U.K.-Ukraine Political, Free Trade and Strategic Partnership Agreement was signed on October 8, the second day of Ukrainian President Volodymyr Zelens­kyy’s visit to Britain.

The deal “lays the foundation for an intensified bilateral relationship in areas including trade, defense and political cooperation,” Prime Minister Johnson’s office said in statement.