Gavin Williamson has warned that there is an ‘intensifying’ threat from ISIS
Mr Williamson met fellow defence ministers as part of a review into the coalition campaign to destroy the terrorist organisation.
The terror state was officially defeated last year, however, enclaves of extremists affiliated to the group remain throughout the Middle East.
Mr Williamson said: “The UK will not be complacent when it comes to terrorism – a point I reaffirmed with my Global Coalition counterparts today.
“We pledged to continue to fight terrorists until their poisonous global network is totally destroyed.”
The UK has committed itself to continuing to target cells of terrorists in countries such as Syria, Libya and Afghanistan.
There are fears that unless coalition forces extend their attacks on terrorists in the region, ISIS may one again try to form a physical state.
As well as looking at how to tackle extremism abroad, international ministers also discussed how to defeat terrorism at home.
The Defence Secretary added: “Despite Daesh’s diminishing territory, it is hell-bent on directing and inspiring terrorist attacks worldwide – threatening our security at home and abroad.
“The threat they pose is evolving and intensifying but our resolve to defeat them will not fade.”
ISIS has claimed responsibility for four terror attacks in the UK over the last 12 months.
The organisation has said they played a part in the incidents on Westminster and London Bridges, as well as the Manchester Arena bombing and a failed suicide bomb at Parsons Green tube station.
However, the Home Secretary has questioned the terror state’s role in some of the attacks.
After the Parsons Green bomb, she said there was “no evidence” ISIS was behind the incident.
Thee were four attacks in the UK last year ISIS claimed responsibility for
Amber Rudd has launched a crackdown on extremism online
In a bid to crack down on ISIS radicalisation at home Ms Rudd has unveiled a high-tech scheme to prevent Islamic State terrorists targeting new recruits with web propaganda.
Computer scientists say the new artificial intelligence model can identify sickening internet videos by picking out “subtle signals”.
They believe the system will allow them to detect 94 per cent of IS material and block jihadi videos as they are being posted to the web.
While Mr Williamson was meeting defence ministers in Europe, Mrs Rudd made her announcement as she flew to America to discuss the online anti-terror battle with Kirstjen Nielsen, US Secretary of Homeland Security.