diff --git a/CUSTOMIZE.md b/CUSTOMIZE.md
index a12f5687dfac..0bf9e692e581 100644
--- a/CUSTOMIZE.md
+++ b/CUSTOMIZE.md
@@ -95,19 +95,19 @@ scholar:
 If the entry matches one form of the last names and the first names, it will be underlined. Keep meta-information about your co-authors in [\_data/coauthors.yml](_data/coauthors.yml) and Jekyll will insert links to their webpages automatically. The co-author data format is as follows,
 
 ```yaml
-"Adams":
+"adams":
   - firstname: ["Edwin", "E.", "E. P.", "Edwin Plimpton"]
     url: https://en.wikipedia.org/wiki/Edwin_Plimpton_Adams
 
-"Podolsky":
+"podolsky":
   - firstname: ["Boris", "B.", "B. Y.", "Boris Yakovlevich"]
     url: https://en.wikipedia.org/wiki/Boris_Podolsky
 
-"Rosen":
+"rosen":
   - firstname: ["Nathan", "N."]
     url: https://en.wikipedia.org/wiki/Nathan_Rosen
 
-"Bach":
+"bach":
   - firstname: ["Johann Sebastian", "J. S."]
     url: https://en.wikipedia.org/wiki/Johann_Sebastian_Bach