Morgan has been superb for the Blues since arriving on a short-term deal in September, playing a key role as Gareth Ainsworth’s men have climbed the League 2 table.
The 29-year-old has produced some scintillating attacking displays, creating numerous chances and scoring five times including a classy brace in the 2-2 draw with Morecambe in early December.
"I feel like I’ve done alright in the time I’ve been here and want to continue and help us move up the league," Morgan told Chairboys Player.
"I’m enjoying myself, enjoying playing under Gaz and he gives me the freedom to play my game. I love all the boys too.
"It was a no-brainer – I’m 40 minutes from home and closer to my family and friends. When you’ve got a circle like that, you don’t want to break it."
Ainsworth said: "It’s fantastic news. It’s no secret that Dean’s been one of our biggest influences and it’s been superb how he’s conducted and applied himself in games.
"He’s had a couple of little niggles but when Dean Morgan’s fit, he’s a great player. He’s something that no-one else has in this division.
"It’s nice for me that’s he’s committed himself until the end of the season, hopefully he can kick on and we can get even more out of him."
Dean could come up against former his club Chesterfield on Saturday – buy your tickets online or by calling 01494 441118.