- 1.2.3
diff --git a/doc/build/changelog.rst b/doc/build/changelog.rst
index 5ca49de..e04878b 100644
--- a/doc/build/changelog.rst
+++ b/doc/build/changelog.rst
@@ -8,7 +8,21 @@
 
 .. changelog::
     :version: 1.2.3
-    :include_notes_from: unreleased
+    :released: Thu Sep 22 2022
+
+    .. change::
+        :tags: bug, lexer
+        :tickets: 367
+
+        Fixed issue in lexer in the same category as that of :ticket:`366` where
+        the regexp used to match an end tag didn't correctly organize for matching
+        characters surrounded by whitespace, leading to high memory / interpreter
+        hang if a closing tag incorrectly had a large amount of unterminated space
+        in it. Credit to Sebastian Chnelik for locating the issue.
+
+        As Mako templates inherently render and directly invoke arbitrary Python
+        code from the template source, it is **never** appropriate to create
+        templates that contain untrusted input.
 
 .. changelog::
     :version: 1.2.2
diff --git a/doc/build/conf.py b/doc/build/conf.py
index 4cc9f33..7d21f1e 100644
--- a/doc/build/conf.py
+++ b/doc/build/conf.py
@@ -87,8 +87,8 @@
 # The short X.Y version.
 version = mako.__version__
 # The full version, including alpha/beta/rc tags.
-release = "1.2.2"
-release_date = "Mon Aug 29 2022"
+release = "1.2.3"
+release_date = "Thu Sep 22 2022"
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 # language = None
diff --git a/doc/build/unreleased/367.rst b/doc/build/unreleased/367.rst
deleted file mode 100644
index 6798e6e..0000000
--- a/doc/build/unreleased/367.rst
+++ /dev/null
@@ -1,13 +0,0 @@
-.. change::
-    :tags: bug, lexer
-    :tickets: 367
-
-    Fixed issue in lexer in the same category as that of :ticket:`366` where
-    the regexp used to match an end tag didn't correctly organize for matching
-    characters surrounded by whitespace, leading to high memory / interpreter
-    hang if a closing tag incorrectly had a large amount of unterminated space
-    in it. Credit to Sebastian Chnelik for locating the issue.
-
-    As Mako templates inherently render and directly invoke arbitrary Python
-    code from the template source, it is **never** appropriate to create
-    templates that contain untrusted input.