diff --git a/translations/en/indicator.yml b/translations/en/indicator.yml
index 263ca817..1bbbac5a 100644
--- a/translations/en/indicator.yml
+++ b/translations/en/indicator.yml
@@ -160,5 +160,5 @@ proxy_description: This indicator contains some alternative data to those specif
 # Description of a footnote that is applied to a particular data value (observation).
 note: note
 # Yes/No for binary-style charts and tables
-affirmative: Yes
-negative: No
+affirmative: 'Yes'
+negative: 'No'