diff --git a/base/README.md b/base/README.md
index 97b5f8d9f..915515188 100644
--- a/base/README.md
+++ b/base/README.md
@@ -1,7 +1,7 @@
 The LaTeX kernel
 ================
 
-Release 2021-11-15
+Release 2021-11-15 patch level 1
 
 Overview
 --------
diff --git a/base/changes.txt b/base/changes.txt
index 9fefa046d..1b8b0fc5d 100644
--- a/base/changes.txt
+++ b/base/changes.txt
@@ -10,6 +10,10 @@ are not part of the distribution.
 All changes above are only part of the development branch for the next release.
 ================================================================================
 
+#########################
+# 2021-11-15 PL1 Release
+#########################
+
 2021-12-02 Joseph Wright <Joseph.Wright@latex-project.org>
 
   * ltcmd.dtx
diff --git a/base/ltvers.dtx b/base/ltvers.dtx
index 9ce8d74cc..82f2034fd 100644
--- a/base/ltvers.dtx
+++ b/base/ltvers.dtx
@@ -115,7 +115,7 @@
    {2021-11-15}
 %</2ekernel|latexrelease>
 %<*2ekernel>
-\def\patch@level{0}
+\def\patch@level{1}
 %    \end{macrocode}
 %
 % \begin{macro}{\development@branch@name}