diff --git a/src/epub/text/chapter-1.xhtml b/src/epub/text/chapter-1.xhtml
index d28c691..6f3ea37 100644
--- a/src/epub/text/chapter-1.xhtml
+++ b/src/epub/text/chapter-1.xhtml
@@ -1,7 +1,7 @@
- Chapter 1
+ I
diff --git a/src/epub/text/chapter-2.xhtml b/src/epub/text/chapter-2.xhtml
index aa236c6..59d1d61 100644
--- a/src/epub/text/chapter-2.xhtml
+++ b/src/epub/text/chapter-2.xhtml
@@ -1,7 +1,7 @@
- Chapter 2
+ II
diff --git a/src/epub/text/chapter-3.xhtml b/src/epub/text/chapter-3.xhtml
index a584f04..d17c77d 100644
--- a/src/epub/text/chapter-3.xhtml
+++ b/src/epub/text/chapter-3.xhtml
@@ -1,7 +1,7 @@
- Chapter 3
+ III
diff --git a/src/epub/text/chapter-4.xhtml b/src/epub/text/chapter-4.xhtml
index 8f657d9..2d961fb 100644
--- a/src/epub/text/chapter-4.xhtml
+++ b/src/epub/text/chapter-4.xhtml
@@ -1,7 +1,7 @@
- Chapter 4
+ IV
diff --git a/src/epub/text/chapter-5.xhtml b/src/epub/text/chapter-5.xhtml
index 2333acf..300860b 100644
--- a/src/epub/text/chapter-5.xhtml
+++ b/src/epub/text/chapter-5.xhtml
@@ -1,7 +1,7 @@
- Chapter 5
+ V
diff --git a/src/epub/text/chapter-6.xhtml b/src/epub/text/chapter-6.xhtml
index bbb903c..dceef32 100644
--- a/src/epub/text/chapter-6.xhtml
+++ b/src/epub/text/chapter-6.xhtml
@@ -1,7 +1,7 @@
- Chapter 6
+ VI
diff --git a/src/epub/text/chapter-7.xhtml b/src/epub/text/chapter-7.xhtml
index b8c9495..669e169 100644
--- a/src/epub/text/chapter-7.xhtml
+++ b/src/epub/text/chapter-7.xhtml
@@ -1,7 +1,7 @@
- Chapter 7
+ VII
diff --git a/src/epub/text/chapter-8.xhtml b/src/epub/text/chapter-8.xhtml
index 576f2be..c128b47 100644
--- a/src/epub/text/chapter-8.xhtml
+++ b/src/epub/text/chapter-8.xhtml
@@ -1,7 +1,7 @@
- Chapter 8
+ VIII
diff --git a/src/epub/text/chapter-9.xhtml b/src/epub/text/chapter-9.xhtml
index faa81ea..23c3993 100644
--- a/src/epub/text/chapter-9.xhtml
+++ b/src/epub/text/chapter-9.xhtml
@@ -1,7 +1,7 @@
- Chapter 9
+ IX