diff --git a/chapters/chap2.pdf b/chapters/chap2.pdf
index 6da2447..ce52c57 100644
Binary files a/chapters/chap2.pdf and b/chapters/chap2.pdf differ
diff --git a/main.pdf b/main.pdf
index 146d831..8257188 100644
Binary files a/main.pdf and b/main.pdf differ
diff --git a/main.tex b/main.tex
index 76cf03d..2e7f4c4 100644
--- a/main.tex
+++ b/main.tex
@@ -95,7 +95,7 @@
 
 % Each chapter is in its own file and included as a subfile.
 % \subfile{preface}
-% \subfile{chapters/chap0}
+\subfile{chapters/chap0}
 \subfile{chapters/chap1}
 \subfile{chapters/chap2}
 \subfile{chapters/chap3}