diff --git a/source/2/2.3/Graphics_Applications.rst b/source/2/2.3/Graphics_Applications.rst
index b7b71c69..90ebaa86 100644
--- a/source/2/2.3/Graphics_Applications.rst
+++ b/source/2/2.3/Graphics_Applications.rst
@@ -1,4 +1,4 @@
-Chapter 2.2.3 Graphics Applications
+Chapter 2.3 Graphics Applications
 ===================================
 
 .. toctree::
diff --git a/source/4/Installing_Updating_and_Removing_Software.rst b/source/4/Installing_Updating_and_Removing_Software.rst
index 239b108f..194899cc 100644
--- a/source/4/Installing_Updating_and_Removing_Software.rst
+++ b/source/4/Installing_Updating_and_Removing_Software.rst
@@ -1,4 +1,4 @@
-Chapter 4 Installing Updating and Removing_Software
+Chapter 4 Installing Updating and Removing Software
 ===================================================
 
 .. toctree::