diff --git a/01.md b/01.md
index adf6147..63d3d35 100644
--- a/01.md
+++ b/01.md
@@ -10,7 +10,7 @@ chapter: '01'
 pages: 004-019
 ---
 
-# *Part I* {align="center"}
+# Part I
 
 ## Chapter 1\
  The Best Optimizer Is between Your Ears {#Heading1}
diff --git a/23.md b/23.md
index f94d48b..265f072 100644
--- a/23.md
+++ b/23.md
@@ -10,7 +10,7 @@ chapter: '23'
 pages: 423-448
 ---
 
-# *Part II* {align="center"}
+# Part II
 
 ## Chapter 23\
  Bones and Sinew {#Heading1}