diff --git a/Bookshelf/Apostol/Chapter_I_03.lean b/Bookshelf/Apostol/Chapter_I_03.lean
index 255760a..fb48e62 100644
--- a/Bookshelf/Apostol/Chapter_I_03.lean
+++ b/Bookshelf/Apostol/Chapter_I_03.lean
@@ -1,11 +1,11 @@
 import Common.Real.Set
 
-/-! # Apostol.Chapter_I_3
+/-! # Apostol.Chapter_I_03
 
 A Set of Axioms for the Real-Number System
 -/
 
-namespace Apostol.Chapter_I_3
+namespace Apostol.Chapter_I_03
 
 #check Archimedean
 #check Real.exists_isLUB
@@ -640,4 +640,4 @@ the Archimedean property does not imply the least-upper-bound axiom.
 ###### TODO
 -/
 
-end Apostol.Chapter_I_3
\ No newline at end of file
+end Apostol.Chapter_I_03
diff --git a/Bookshelf/Apostol/Chapter_I_03.tex b/Bookshelf/Apostol/Chapter_I_03.tex
index 7488e0f..f62709c 100644
--- a/Bookshelf/Apostol/Chapter_I_03.tex
+++ b/Bookshelf/Apostol/Chapter_I_03.tex
@@ -3,9 +3,9 @@
 \input{../../preamble}
 
 \newcommand{\link}[1]{\lean{../..}
-  {Bookshelf/Apostol/Chapter\_I\_3}
-  {Apostol.Chapter\_I\_3.#1}
-  {Chapter\_I\_3.#1}
+  {Bookshelf/Apostol/Chapter\_I\_03} % Location
+  {Apostol.Chapter\_I\_03.#1} % Namespace
+  {Chapter\_I\_03.#1} % Presentation
 }
 
 \begin{document}
diff --git a/Bookshelf/Enderton.lean b/Bookshelf/Enderton.lean
index 18d7966..30e3af7 100644
--- a/Bookshelf/Enderton.lean
+++ b/Bookshelf/Enderton.lean
@@ -1 +1 @@
-import Bookshelf.Enderton.Chapter0
\ No newline at end of file
+import Bookshelf.Enderton.Chapter_0
diff --git a/Bookshelf/Enderton/Chapter0.lean b/Bookshelf/Enderton/Chapter_0.lean
similarity index 99%
rename from Bookshelf/Enderton/Chapter0.lean
rename to Bookshelf/Enderton/Chapter_0.lean
index d7f1c36..5ef44b3 100644
--- a/Bookshelf/Enderton/Chapter0.lean
+++ b/Bookshelf/Enderton/Chapter_0.lean
@@ -1,11 +1,11 @@
 import Common.LTuple.Basic
 
-/-! # Enderton.Chapter0
+/-! # Enderton.Chapter_0
 
 Useful Facts About Sets
 -/
 
-namespace Enderton.Chapter0
+namespace Enderton.Chapter_0
 
 /--
 The following describes a so-called "generic" tuple. Like an `LTuple`, a generic
@@ -275,4 +275,4 @@ theorem lemma_0a (xs : GTuple α (n, m - 1)) (ys : LTuple α (m + k))
 
 end
 
-end Enderton.Chapter0
\ No newline at end of file
+end Enderton.Chapter_0
diff --git a/Bookshelf/Enderton/Chapter0.tex b/Bookshelf/Enderton/Chapter_0.tex
similarity index 79%
rename from Bookshelf/Enderton/Chapter0.tex
rename to Bookshelf/Enderton/Chapter_0.tex
index d9a2caf..0405113 100644
--- a/Bookshelf/Enderton/Chapter0.tex
+++ b/Bookshelf/Enderton/Chapter_0.tex
@@ -3,9 +3,9 @@
 \input{../../preamble}
 
 \newcommand{\link}[1]{\lean{../..}
-  {Bookshelf/Enderton/Chapter0} % Location
-  {Enderton.Chapter0.#1} % Namespace
-  {Chapter0.#1} % Presentation
+  {Bookshelf/Enderton/Chapter_0} % Location
+  {Enderton.Chapter_0.#1} % Namespace
+  {Chapter_0.#1} % Presentation
 }
 
 \begin{document}
diff --git a/lake-manifest.json b/lake-manifest.json
index 05cbe49..b5e122a 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -16,9 +16,9 @@
   {"git":
    {"url": "https://github.com/jrpotter/bookshelf-docgen.git",
     "subDir?": null,
-    "rev": "291f71e6c520751d52832c95f47cbc059c77bfa7",
+    "rev": "80a4dc8d508161c859dbbb455f3855e051a28890",
     "name": "doc-gen4",
-    "inputRev?": "291f71e6c520751d52832c95f47cbc059c77bfa7"}},
+    "inputRev?": "80a4dc8d508161c859dbbb455f3855e051a28890"}},
   {"git":
    {"url": "https://github.com/mhuisi/lean4-cli",
     "subDir?": null,
diff --git a/lakefile.lean b/lakefile.lean
index 1d2e9d9..fd5969f 100644
--- a/lakefile.lean
+++ b/lakefile.lean
@@ -12,7 +12,7 @@ require std4 from git
     "6006307d2ceb8743fea7e00ba0036af8654d0347"
 require «doc-gen4» from git
   "https://github.com/jrpotter/bookshelf-docgen.git" @
-    "291f71e6c520751d52832c95f47cbc059c77bfa7"
+    "80a4dc8d508161c859dbbb455f3855e051a28890"
 
 @[default_target]
 lean_lib «Bookshelf» {