Help with syntax highlighting for YAML files?

I work as an editor, working primarily in .adoc and .yml files and Kate 
does a great job. I have recently come across a curious behaviour where 
Kate takes the apostrophe in my surname to mean the end of the current 
string or block (I don't know the correct terminology, sorry). This 
means that all syntax highlighting after the apostrophe is lost. I can 
use two apostrophes to "fix" it, but the output is then two apostrophes.

Is there a way I can edit the way Kate sees apostrophes so that it just 
treats them as standard characters?

OBrien  <-- No issues.

O'Brien <-- Syntax highlighting is "broken" after the apostrophe.

O`Brien <-- No issues if I use a backtick.

Please CC me on any replies.

Thanks very much.

-- 
David
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