diff --git a/packages/common/src/normalize-string.spec.ts b/packages/common/src/normalize-string.spec.ts
index 27bfca888d..b0324c8ac1 100644
--- a/packages/common/src/normalize-string.spec.ts
+++ b/packages/common/src/normalize-string.spec.ts
@@ -25,7 +25,7 @@ describe('normalizeString()', () => {
     it('strips non-alphanumeric characters', () => {
         expect(normalizeString('hi!!!')).toBe('hi');
         expect(normalizeString('who? me?')).toBe('who me');
-        expect(normalizeString('!"£$%^&*()+[]{};:@#~?/,|\\><`¬\'=')).toBe('');
+        expect(normalizeString('!"£$%^&*()+[]{};:@#~?/,|\\><`¬\'=©®™')).toBe('');
     });
 
     it('allows a subset of non-alphanumeric characters to pass through', () => {
diff --git a/packages/common/src/normalize-string.ts b/packages/common/src/normalize-string.ts
index 48aa45c676..b3fc74c814 100644
--- a/packages/common/src/normalize-string.ts
+++ b/packages/common/src/normalize-string.ts
@@ -8,6 +8,6 @@ export function normalizeString(input: string, spaceReplacer = ' '): string {
         .normalize('NFD')
         .replace(/[\u0300-\u036f]/g, '')
         .toLowerCase()
-        .replace(/[!"£$%^&*()+[\]{};:@#~?\\/,|><`¬'=‘’]/g, '')
+        .replace(/[!"£$%^&*()+[\]{};:@#~?\\/,|><`¬'=‘’©®™]/g, '')
         .replace(/\s+/g, spaceReplacer);
 }