diff --git a/ts/quill/emoji/completion.tsx b/ts/quill/emoji/completion.tsx
index 3cc2413df..ce164ad31 100644
--- a/ts/quill/emoji/completion.tsx
+++ b/ts/quill/emoji/completion.tsx
@@ -123,8 +123,8 @@ export class EmojiCompletion {
     const [leftTokenTextMatch, rightTokenTextMatch] = matchBlotTextPartitions(
       blot,
       index,
-      /(?<=^|\s):([-+0-9a-z_]*)(:?)$/,
-      /^([-+0-9a-z_]*):/
+      /(?<=^|\s):([-+0-9a-zA-Z_]*)(:?)$/,
+      /^([-+0-9a-zA-Z_]*):/
     );
 
     if (leftTokenTextMatch) {