diff --git a/12/Java/SaxonHE12-3J.zip b/12/Java/SaxonHE12-3J.zip
new file mode 100644
index 0000000..3460fd0
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diff --git a/12/README.md b/12/README.md
index 77c27fc..810d20b 100644
--- a/12/README.md
+++ b/12/README.md
@@ -7,10 +7,10 @@
 
 The Saxon-HE 12 releases are available in the [Java](Java) folder.
 
-## Release notes for Saxon 12, dated 2023-05-02
+## Release notes for Saxon 12, dated 2023-07-04
 
-Saxon 12.2 is latest maintenance release on the Saxon 12 branch.
-Saxon 12.2 is released in three language versions: SaxonJ
+Saxon 12.3 is latest maintenance release on the Saxon 12 branch.
+Saxon 12.3 is released in three language versions: SaxonJ
 (Java), SaxonCS (.NET 6+), and SaxonC (C/C++, PHP, and Python). For
 SaxonJ and SaxonC, there are three editions: (EE, PE, and HE); for
 SaxonCS, only the enterprise edition (EE) is available.
@@ -29,9 +29,9 @@ installation instructions.
 Links to all download files can be found at
 https://www.saxonica.com/download/download_page.xml.
 
-For a full list of bugs cleared in Saxon 12.2, please go to
+For a full list of bugs cleared in Saxon 12.3, please go to
 https://saxonica.plan.io/projects/saxon/issues and filter the list of bugs for those labelled as
-"Fixed in Release 12.2"; or use
+"Fixed in Release 12.3"; or use
 [this link](https://saxonica.plan.io/projects/saxon/issues?utf8=%E2%9C%93&set_filter=1&sort=id%3Adesc&f%5B%5D=status_id&op%5Bstatus_id%5D=c&f%5B%5D=cf_6&op%5Bcf_6%5D=%3D&v%5Bcf_6%5D%5B%5D=91&f%5B%5D=&c%5B%5D=tracker&c%5B%5D=status&c%5B%5D=priority&c%5B%5D=subject&c%5B%5D=assigned_to&c%5B%5D=updated_on&group_by=&t%5B%5D=).
 
 For further details of these bugs, or for details of bugs cleared in
@@ -56,6 +56,6 @@ https://saxonica.plan.io/projects/saxonmirrorhe/repository.
 (b) For convenience, a zip file is made available which contains
 preprocessed source code that can be loaded directly into an IDE. See the
 [source](source) folder; the latest version is
-[saxon12-2source.zip](source/saxon12-2source.zip).
+[saxon12-3source.zip](source/saxon12-3source.zip).
 
 
diff --git a/12/resources/saxon-resources-12.zip b/12/resources/saxon-resources-12.zip
index dc3fe06..641099f 100644
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diff --git a/12/source/saxon12-3source.zip b/12/source/saxon12-3source.zip
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diff --git a/README.md b/README.md
index 77b76e8..324fc39 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The latest production release of Saxon-HE is [11.5](11).
 
 Saxon 11 is currently considered the most stable and reliable release.
 
-The latest release of Saxon-HE is [12.2](12).
+The latest release of Saxon-HE is [12.3](12).
 
 You can download any of the current releases from the
 [releases](https://github.com/Saxonica/Saxon-HE/releases) area on this repository.