diff --git a/handbook/handbook.md b/handbook/handbook.md
index 656ac078bb..70e6cec8a5 100644
--- a/handbook/handbook.md
+++ b/handbook/handbook.md
@@ -19,7 +19,7 @@ Keep headings brief and organize them in a logical order:
 * H3: Subheadings
 * H4: Sub-subheadings (headings nested under subheadings)
 
-Try to stay within 3 or 4 heading levels. Complicated documents may use more, but pages with a simpler structure are easier to read.
+Try to stay within three or four heading levels. Complicated documents may use more, but pages with a simpler structure are easier to read.
 
 ## Contributing to the handbook