diff --git a/GIT_BRANCHES.TXT b/GIT_BRANCHES.TXT
index 2b0e481..b8658ce 100644
--- a/GIT_BRANCHES.TXT
+++ b/GIT_BRANCHES.TXT
@@ -28,8 +28,13 @@ Currently, there are three branches in the MSB GIT repository:
 - 14.2-mate-1.14:
 - 14.2-mate-1.16:
 - 14.2-mate-1.18:  The MSB stable branch for Slackware 14.2.
-  This is the currently supported branch and only receives bug fix updates.
   The MSB 1.18 binary packages for Slackware 14.2 are built from this branch.
+  Since Slackware 15.0 has been released as the next stable release
+  then this branch is considered obsoleted and no longer updated.
+
+- 15.0-mate-1.26:  The MSB stable branch for Slackware 15.0
+  This is the currently supported branch only receives bug fix updates.
+  The MSB 1.26 binary packages for Slackware 15.0 are built from this branch.
   You might want to use this branch if you enjoy stable releases.
 
 An easy way to find out which branch are you in right now (once you have
@@ -48,13 +53,14 @@ Example output of 'git branch':
   14.2-mate-1.14
   14.2-mate-1.16
   14.2-mate-1.18
+  15.0-mate-1.26
 * master
 
 This output indicates that you are now in the 'master' branch.
 
 To switch to another branch, use 'git checkout <branch_name>'.  Example:
 
-$ git checkout 14.2-mate-1.18
+$ git checkout 15.0-mate-1.26
 $ git branch
 
   14.0-mate-1.6
@@ -64,8 +70,9 @@ $ git branch
   14.1-mate-1.12
   14.2-mate-1.14
   14.2-mate-1.16
-* 14.2-mate-1.18
+  14.2-mate-1.18
+  15.0-mate-1.26
   master
 
-You have now switched from the 'master' branch to the '14.2-mate-1.18'
+You have now switched from the 'master' branch to the '15.0-mate-1.26'
 branch.
diff --git a/README.TXT b/README.TXT
index f2106f3..9bae159 100644
--- a/README.TXT
+++ b/README.TXT
@@ -15,8 +15,8 @@ After cloning the initial Git repo, you will be using 'master' branch which
 will build the latest release or development branch for MATE desktop.
 Building from the master branch is not supported and may or may not work at
 any given moment. Most users will want to build from the stable branch which
-is MATE version 1.18, released in March 2017.  Checkout that branch using 'git
-checkout 14.2-mate-1.18' to build from the stable MSB branch.
+is MATE version 1.26, released in October 2021.  Checkout that branch using 'git
+checkout 15.0-mate-1.26' to build from the stable MSB branch.
 
 The rest of this README.TXT is specific to building from the 'master'
 branch which will build MATE 1.26, which is the latest stable version of MATE.
@@ -30,10 +30,10 @@ and install all the necessary dependencies in the /deps directory.
 Please use "su" or "su -" to build as root instead of using "sudo".
 
 3.  Run the 'mate-build-base.sh' in the msb root directory which will build
-and install all the base (required) packages. There are a total of 24 packages
+and install all the base (required) packages. There are a total of 25 packages
 and they do not replace any stock Slackware packages. The SlackBuilds will use
 wget to download the sources.  Or, you can also manually download the
-sources from: http://pub.mate-desktop.org/releases/1.24 and the download
+sources from: http://pub.mate-desktop.org/releases/1.26 and the download
 locations for each dependency and put each source into the corresponding
 directory within 'base' and 'deps'.