diff --git a/regex_patterns/Colour.yml b/regex_patterns/Colour.yml
index e63e733..84d0c12 100644
--- a/regex_patterns/Colour.yml
+++ b/regex_patterns/Colour.yml
@@ -1,5 +1,5 @@
 name: Colour
-pattern: \bcolou?r(ized?|ed)?\b
+pattern: \bcolou?r(i[sz]ed?|ed)?\b
 description: '- Matches `colour`, `coloured`, `colourize`, `colourized`.
 
   - Handles both American ("color") and British ("colour") spellings.'