diff --git a/lib/theme-i18n.json b/lib/theme-i18n.json
index f0569bd9301c1..e4d14502132cb 100644
--- a/lib/theme-i18n.json
+++ b/lib/theme-i18n.json
@@ -41,7 +41,7 @@
 		"dimensions": {
 			"aspectRatios": [
 				{
-					"Name": "Aspect ratio name"
+					"name": "Aspect ratio name"
 				}
 			]
 		},