diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0168467..6c29de6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,6 +2,7 @@ pages:
   image: fedora:27
   script:
   - dnf install -y asciidoctor gnutls-devel openssl-devel nss-devel gcc-go gcc make java-devel gcc-c++ expat-devel qt-devel
+  - gem install pygments.rb
   - make
   - make build-manual
   - mkdir -p public
@@ -20,6 +21,7 @@ test:
   image: fedora:27
   script:
   - dnf install -y asciidoctor gnutls-devel openssl-devel nss-devel gcc-go gcc make java-devel gcc-c++ expat-devel qt-devel
+  - gem install pygments.rb
   - make
   tags:
   - shared
diff --git a/Makefile b/Makefile
index d6e98e4..6e66bb2 100644
--- a/Makefile
+++ b/Makefile
@@ -13,10 +13,10 @@ build-snippets:
 	  src/*.c src/*.cpp src/*.java src/*.py src/*.go src/*.sh
 
 build-manual: build-snippets
-	cd en-US && asciidoctor master.adoc
+	cd en-US && asciidoctor -n master.adoc
 
 build-manual-html: build-snippets
-	cd en-US && asciidoctor master.adoc
+	cd en-US && asciidoctor -n master.adoc
 
 build-manual-epub: build-snippets
 	false
diff --git a/en-US/Book_Info.adoc b/en-US/Book_Info.adoc
index a89eb24..be505ff 100644
--- a/en-US/Book_Info.adoc
+++ b/en-US/Book_Info.adoc
@@ -1,8 +1,4 @@
 
-:experimental:
-
-= Defensive Coding
-
 A Guide to Improving Software Security
 
 [abstract]
@@ -17,4 +13,4 @@ concrete recommendations.
 image:Common_Content/images/title_logo.svg[]
 include::Common_Content/Legal_Notice.adoc[]
 
-include::Author_Group.adoc[]
\ No newline at end of file
+include::Author_Group.adoc[]
diff --git a/en-US/master.adoc b/en-US/master.adoc
index cdb8374..136bb29 100644
--- a/en-US/master.adoc
+++ b/en-US/master.adoc
@@ -1,7 +1,11 @@
-
 :doctype: book
 :toc: left
 :toclevels: 3
+:source-highlighter: pygments
+:pygments-style: manni
+:pygments-linenums-mode: inline
+
+= Defensive Coding Guide
 
 include::Book_Info.adoc[]