Henri II continued to produce and bottle Oude Geuze and Oude Kriek by hand until 1988. When it became too difficult to hand-bottle his lambics and not financially beneficial to purchase a new bottling machine, the task was outsourced to [[Brouwerij Boon|Boon]] where it is still carried out today. Henri II reached the point of retirement in 1991. After his son Hubert expressed no interest in continuing the tradition, Oud Beersel was passed on to his nephew Danny Draps. The situation was not ideal for Dany, and the lambic industry as a whole was on the decline. Brewing eventually ceased at Oud Beersel altogether and was outsourced to Boon. By 2002 Danny had found a new job and made the decision to close Oud Beersel for good. Henri Vandervelden II began to search for another successor.<ref name=GeuzeKriek>Jef Van den Steen, [[Books#Geuze & Kriek: The Secret of Lambic Beer|Geuze & Kriek: The Secret of Lambic Beer]], 2012</ref>
Nearly three years later in November of 2005 a pair of friends, Gert Christiaens & Roland De Bus reopened the brewery and restarted wort production at Boon. Though reopened only as a side project, Oud Beersel continued to grow and Roland De Bus resigned in 2007 leaving the company to Gert Christiaens and his wife Jos. Today, Oud Beersel lambic is still brewed at Boon based on specifications from older recipes of the Vandervelden family and then immediately transported to Oud Beersel for barreling. Though the wort is still brewed at Boon, Oud Beersel is blended in-house without the addition of other brewery’s lambic. Today Oud Beersel’s production is up to nearly 1,050 hectoliters, half of which which includes two non-lambic beers.<ref name=GeuzeKriek>Jef Van den Steen,[[Books#Geuze & Kriek: The Secret of Lambic Beer|Geuze & Kriek: The Secret of Lambic Beer]], 2012</ref> Oud Beersel became a member of [[HORAL|HORAL]] on January 18, 2006.<ref name=OudBeerselHistory> Oud Beersel History (Dutch), http://www.oudbeersel.com/brouwerij/historie/</ref> <ref name=HoralOudBeersel>HORAL, Oud Beersel (Dutch), http://www.horal.be/vereniging/oud-beersel-beersel</ref> On May 25, 2006 , exactly six months after the official reopening of the brewery, Oud Beersel released a limited test batch of Oude Gueuze and Oude Kriek which paved the way for the 2007 bottling of Oude Gueuze to be voted the world’s best gueuze by the magazine “Beers of the World".<ref name=OudBeerselHistory> Oud Beersel History (Dutch), http://www.oudbeersel.com/brouwerij/historie/</ref>
===Boon's involvement in Oud Beersel===
The following was posted by Frank Boon, owner of [[Brouwerij_Boon|Brouwerij Boon]], on 10/23/2004 on the [http://www.babblebelt.com/bbb_classic/readarc.html?id=1098553776#null Burgundian Babble Belt (BBB)] with regards to his involvement with Oud Beersel throughout the years. Though much has changed since this was posted, it is still an interesting snapshot of the small community of lambic brewers and blenders.