diff --git a/isa/63/10.md b/isa/63/10.md
index 2b75d08b8b..679327cbd1 100644
--- a/isa/63/10.md
+++ b/isa/63/10.md
@@ -2,7 +2,7 @@
 
 "but we rebelled." Here "they" refers to the people of Israel. Isaiah included himself as a member of the people.
 
-# his Holy Spirit
+# his holy Spirit
 
 "Yahweh's Holy Spirit"