diff --git a/CHANGES.md b/CHANGES.md
index 4dc2896..0e72aed 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,15 +2,18 @@ Change history for MIPS
 =======================
 
 
-since 1.5
----------
+Version 1.5.1 - *May 10, 2024*
+------------------------------
+
+#### 5/10/24
+  - Release 1.5.1.
 
 #### 4/16/24
   - Add `full_hist` option to enable saving in `output.hist` trajectories
-    of `x`, `z`, `g`, `h`, `lam`, and `mu` (issue [#4][2]).
+    of `x`, `z`, `g`, `h`, `lam`, and `mu` (issue [#4][3]).
 
 #### 3/12/24
-  - Add Sphinx-based Reference documentation.
+  - Add Sphinx-based [Reference documentation][2].
 
 
 Version 1.5 - *Dec 12, 2022*
@@ -287,4 +290,5 @@ Version 1.0b1 - *Dec 24, 2009* (released with MATPOWER 4.0b1)
 
 ----
 [1]: https://travis-ci.org
-[2]: https://github.com/MATPOWER/mips/issues/4
\ No newline at end of file
+[2]: https://matpower.org/doc/mips/
+[3]: https://github.com/MATPOWER/mips/issues/4
diff --git a/CITATION b/CITATION
index 36f447e..44717f6 100644
--- a/CITATION
+++ b/CITATION
@@ -10,12 +10,12 @@ the following 2007 paper.
 The MATPOWER Interior Point Solver (MIPS) User's Manual should also be
 cited explicitly in work that refers to or is derived from its content.
 The citation and DOI can be version-specific or general, as appropriate.
-For version 1.5, use:
+For version 1.5.1, use:
 
   R. D. Zimmerman, H. Wang. MATPOWER Interior Point Solver (MIPS)
-  User's Manual, Version 1.5. 2022. [Online].
-  Available: https://matpower.org/docs/MIPS-manual-1.5.pdf
-  doi: 10.5281/zenodo.7430306
+  User's Manual, Version 1.5.1. 2024. [Online].
+  Available: https://matpower.org/docs/MIPS-manual-1.5.1.pdf
+  doi: 10.5281/zenodo.11176870
 
 For a version non-specific citation, use the following citation and DOI,
 with <YEAR> replaced by the year of the most recent release:
diff --git a/LICENSE b/LICENSE
index 07c626c..7083aa5 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 1996-2022, Power Systems Engineering Research Center (PSERC)
+Copyright (c) 1996-2024, Power Systems Engineering Research Center (PSERC)
 and individual contributors (see AUTHORS file for details).
 All rights reserved.
 
diff --git a/README.md b/README.md
index f8b4d88..53d0b1c 100644
--- a/README.md
+++ b/README.md
@@ -98,12 +98,12 @@ the following 2007 paper.
 The [MATPOWER Interior Point Solver (MIPS) User's Manual][7] should also be
 cited explicitly in work that refers to or is derived from its content.
 The citation and DOI can be version-specific or general, as appropriate.
-For version 1.5, use:
+For version 1.5.1, use:
 
 >   R. D. Zimmerman, H. Wang. *MATPOWER Interior Point Solver (MIPS)
-    User's Manual, Version 1.5*. 2022. [Online].
-    Available: https://matpower.org/docs/MIPS-manual-1.5.pdf  
-    doi: [10.5281/zenodo.7430306](https://doi.org/10.5281/zenodo.7430306)
+    User's Manual, Version 1.5.1*. 2024. [Online].
+    Available: https://matpower.org/docs/MIPS-manual-1.5.1.pdf  
+    doi: [10.5281/zenodo.11176870](https://doi.org/10.5281/zenodo.11176870)
 
 For a version non-specific citation, use the following citation and DOI,
 with *\<YEAR\>* replaced by the year of the most recent release:
diff --git a/docs/MIPS-manual.pdf b/docs/MIPS-manual.pdf
index c5b143a..1a358b9 100644
Binary files a/docs/MIPS-manual.pdf and b/docs/MIPS-manual.pdf differ
diff --git a/docs/other/MIPS-Release-Checklist.md b/docs/other/MIPS-Release-Checklist.md
index 12e31fd..cc2c146 100644
--- a/docs/other/MIPS-Release-Checklist.md
+++ b/docs/other/MIPS-Release-Checklist.md
@@ -14,6 +14,7 @@ Pre-release
     Appendix C of `MIPS-manual.tex`.
 - Update version number and date in:
   - `mipsver.m`
+  - `docs/sphinx/source/conf.py`
   - `lib/Contents.m`
   - `docs/relnotes/MIPS-Release-Notes-#.#.md`
   - `docs/src/MIPS-manual/MIPS-manual.tex`
@@ -24,7 +25,9 @@ Pre-release
   - Sphinx docs
     - `mp-docs-shared/preamble.tex.txt` - \mipsver
     - `mp-docs-shared/prolog.rst.txt` - in URL in raw-html for |MIPSman|
-  - Copyright line in `LICENSE`.
+  - Copyright line
+    - `LICENSE`
+    - `docs/sphinx/source/conf.py`
 - In `README.md` and `docs/src/MIPS-manual/MIPS-manual.tex`
   - update output of:
     - `test_mips` in Section 2.2
@@ -37,7 +40,7 @@ Pre-release
   - Make updates for current version specific citations:
     - version number (3 places)
     - year
-    - latest version DOI, current is: 10.5281/zenodo.7430306
+    - latest version DOI, current is: 10.5281/zenodo.11176870
       - (update here each time)
     ... in the following places ...
     - CITATION file
@@ -50,27 +53,26 @@ Pre-release
       - search citations in all other projects being updated simultaneously
         - MATPOWER-manual.tex
         - MP-Opt-Model-manual.tex
-- Create `MIPS-manual.pdf` from `MIPS-manual.tex`
-  - move to `docs`
-  - make copy named `MIPS-manual-x.x.pdf`
-    - copy to `docs` directory of `matpower.org-static` git repo
-      - update `MIPS-manual.pdf` symlink on `https://matpower.org/docs/` to point
-        to new `MIPS-manual-x.x.pdf` (replaces existing current version)
-        - `cd dev/projects/matpower.org-static/docs`
-        - `rm MIPS-manual.pdf`
-        - `ln -s ./MIPS-manual-x.x.pdf MIPS-manual.pdf`
-      - commit & push, then pull to matpower.org
-    - upload `MIPS-manual-x.x.pdf` to Zenodo and finish entry for "New Version"
-      - update:
-        - Publication date
-        - Version
-        - Identifiers:
-          - version number in "identical to"
-  - add link on `https://matpower.org/doc/manuals/` page
+- Create `MIPS-manual.pdf` from `MIPS-manual.tex` and move to `docs`.
 - Add release notice with date and version in `CHANGES.md`.
 - Commit all changes to `prep-for-release`.
 - Push `prep-for-release` to GitHub.
 - Make sure CI checks are ok.
+- Make copy of `docs/MIPS-manual.pdf` named `MIPS-manual-x.x.pdf`
+  - copy to `docs` directory of `matpower.org-static` git repo
+    - update `MIPS-manual.pdf` symlink on `https://matpower.org/docs/` to point
+      to new `MIPS-manual-x.x.pdf` (replaces existing current version)
+      - `cd dev/projects/matpower.org-static/docs`
+      - `rm MIPS-manual.pdf`
+      - `ln -s ./MIPS-manual-x.x.pdf MIPS-manual.pdf`
+    - commit & push, then pull to matpower.org
+  - upload `MIPS-manual-x.x.pdf` to Zenodo and finish entry for "New Version"
+    - update:
+      - Publication date
+      - Version
+      - Identifiers:
+        - version number in "identical to"
+- add link on `https://matpower.org/doc/manuals/` page
 
 
 Release
diff --git a/docs/relnotes/MIPS-Release-Notes-1.5.1.md b/docs/relnotes/MIPS-Release-Notes-1.5.1.md
new file mode 100644
index 0000000..b14479a
--- /dev/null
+++ b/docs/relnotes/MIPS-Release-Notes-1.5.1.md
@@ -0,0 +1,20 @@
+What's New in MIPS 1.5.1
+------------------------
+
+#### Released May 10, 2024
+
+Below is a summary of the changes since version 1.5 of MIPS. See the
+[`CHANGES.md`][1] file for all the gory details. For release notes for
+previous versions, see Appendix C of the [MIPS User's Manual][2].
+
+#### New Features:
+  - Add Sphinx-based [Reference documentation][3].
+  - Add `full_hist` option to enable saving in `output.hist`
+    trajectories of `x`, `z`, `g`, `h`, `lam`, and `mu`
+    ([issue #4][4]).
+
+
+[1]: ../../CHANGES.md
+[2]: ../MIPS-manual.pdf
+[3]: https://matpower.org/doc/mips/
+[4]: https://github.com/MATPOWER/mips/issues/4
diff --git a/docs/sphinx/source/conf.py b/docs/sphinx/source/conf.py
index 1534aba..579936a 100644
--- a/docs/sphinx/source/conf.py
+++ b/docs/sphinx/source/conf.py
@@ -22,7 +22,7 @@
 author = 'Ray D. Zimmerman, Hongye Wang'
 
 # The full version, including alpha/beta/rc tags
-release = '1.5+'
+release = '1.5.1'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/docs/src/MIPS-manual/MIPS-manual.tex b/docs/src/MIPS-manual/MIPS-manual.tex
index dd134f4..26b67d0 100644
--- a/docs/src/MIPS-manual/MIPS-manual.tex
+++ b/docs/src/MIPS-manual/MIPS-manual.tex
@@ -140,22 +140,22 @@
 \newcommand{\mptest}[0]{{MP-Test}}
 \newcommand{\mptesturl}[0]{https://github.com/MATPOWER/mptest}
 \newcommand{\mptestlink}[0]{\href{\mptesturl}{\mptest{}}}
-\newcommand{\mptestver}[0]{8.0b1}
+\newcommand{\mptestver}[0]{8.0}
 \newcommand{\mips}[0]{{MIPS}}
 \newcommand{\mipsurl}[0]{https://github.com/MATPOWER/mips}
 \newcommand{\mipslink}[0]{\href{\mipsurl}{\mips{}}}
 \newcommand{\mipsname}[0]{{{\bf M}{\sc atpower} \textbf{I}nterior \textbf{P}oint \textbf{S}olver}}
-\newcommand{\mipsver}[0]{1.5}
+\newcommand{\mipsver}[0]{1.5.1}
 \newcommand{\mpom}[0]{\mbox{MP-Opt-Model}}
 \newcommand{\mpomurl}[0]{https://github.com/MATPOWER/mp-opt-model}
 \newcommand{\mpomlink}[0]{\href{\mpomurl}{\mpom{}}}
 \newcommand{\mpomname}[0]{\mpom{}}
 % \newcommand{\mpomname}[0]{{{\bf M}{\sc at}{\bf P}{\sc ower} \textbf{Opt}imization \textbf{Model}}}
-\newcommand{\mpomver}[0]{4.1}
+\newcommand{\mpomver}[0]{4.2}
 \newcommand{\most}[0]{{MOST}}
 \newcommand{\mostname}[0]{{{\bf M}{\sc atpower} \textbf{O}ptimal \textbf{S}cheduling \textbf{T}ool}}
 \newcommand{\mosturl}[0]{https://github.com/MATPOWER/most}
-\newcommand{\mostver}[0]{1.2}
+\newcommand{\mostver}[0]{1.3}
 \newcommand{\md}[0]{{\most{} Data struct}}
 \newcommand{\powerweb}[0]{{\sc PowerWeb}}
 \newcommand{\pserc}[0]{{\sc PSerc}}
@@ -228,7 +228,7 @@
 \title{\mipsname{}\\\mips{} \mipsver{}\\
 User's Manual}
 \author{Ray~D.~Zimmerman \and Hongye~Wang}
-%\date{December 12, 2022} % comment this line to display the current date
+\date{May 10, 2024} % comment this line to display the current date
 %\date{December 14, 2011\thanks{Second revision. First revision was December 13, 2011}} % comment this line to display the current date
 
 %%% BEGIN DOCUMENT
@@ -238,7 +238,7 @@
 \vfill
 \begin{center}
 {\scriptsize
-\copyright~2009--2022~\PSERC{}\\
+\copyright~2009--2024~\PSERC{}\\
 All Rights Reserved}
 \end{center}
 
@@ -322,13 +322,13 @@ \subsection{Citing \mips{}}
 
 The \mipsname{} (\mips{}) User's Manual~\cite{mips_manual} should also be cited explicitly
 in work that refers to or is derived from its content. The citation and
-DOI can be version-specific or general, as appropriate. For version 1.5,
+DOI can be version-specific or general, as appropriate. For version 1.5.1,
 use:
 
 \begin{quote}
 \footnotesize
-R.~D. Zimmerman, H.~Wang. \mipsname{} (\mips{}) User's Manual, Version 1.5. 2022. [Online]. Available: \url{https://matpower.org/docs/MIPS-manual-1.5.pdf}\\
-\doi{10.5281/zenodo.7430306}
+R.~D. Zimmerman, H.~Wang. \mipsname{} (\mips{}) User's Manual, Version 1.5.1. 2024. [Online]. Available: \url{https://matpower.org/docs/MIPS-manual-1.5.1.pdf}\\
+\doi{10.5281/zenodo.11176870}
 \end{quote}
 For a version non-specific citation, use the following citation and DOI,
 with \emph{\textless{}YEAR\textgreater{}} replaced by the year of the most recent release:
@@ -681,7 +681,7 @@ \subsection{Example 2}
 \end{Code}
 \begin{Code}
 >> mips_example2
-MATPOWER Interior Point Solver -- MIPS, Version 1.5, 12-Dec-2022
+MATPOWER Interior Point Solver -- MIPS, Version 1.5.1, 10-May-2024
  (using built-in linear solver)
  it    objective   step size   feascond     gradcond     compcond     costcond  
 ----  ------------ --------- ------------ ------------ ------------ ------------
@@ -1328,14 +1328,14 @@ \subsubsection*{New Features}
 \end{itemize}
 
 
-\subsection{Version 1.5.x -- released xxx xx, 202x}
-\label{app:v15x}
+\subsection{Version 1.5.1 -- released May 10, 2024}
+\label{app:v151}
 
-The \href{https://matpower.org/docs/MIPS-manual-1.5.x.pdf}{\mips{} 1.5.x User's Manual} is available online.\footnote{\url{https://matpower.org/docs/MIPS-manual-1.5.x.pdf}}
+The \href{https://matpower.org/docs/MIPS-manual-1.5.1.pdf}{\mips{} 1.5.1 User's Manual} is available online.\footnote{\url{https://matpower.org/docs/MIPS-manual-1.5.1.pdf}}
 
 \subsubsection*{New Features}
 \begin{itemize}
-\item Add Sphinx-based Reference documentation.
+\item Add Sphinx-based Reference documentation.\footnote{\url{https://matpower.org/doc/mips/}}
 \item Add \code{full\_hist} option to enable saving in \code{output.hist}
     trajectories of \code{x}, \code{z}, \code{g}, \code{h}, \code{lam}, and
     \code{mu} (issue \#4).
@@ -1403,7 +1403,7 @@ \subsubsection*{New Features}
 \doi{10.5281/zenodo.3236535}
 
 \bibitem{mips_manual}
-R.~D. Zimmerman, H.~Wang. \mipsname{} (\mips{}) User's Manual. 2022.
+R.~D. Zimmerman, H.~Wang. \mipsname{} (\mips{}) User's Manual. 2024.
 [Online]. Available: \url{https://matpower.org/docs/MIPS-manual.pdf}\\
 \doi{10.5281/zenodo.3236506}
 
diff --git a/lib/Contents.m b/lib/Contents.m
index 1423da0..5e718c0 100644
--- a/lib/Contents.m
+++ b/lib/Contents.m
@@ -1,5 +1,5 @@
 % MIPS
-%   Version 1.5         12-Dec-2022
+%   Version 1.5.1       10-May-2024
 %
 %   The MATPOWER Interior Point Solver (MIPS) is a package of MATLAB/Octave
 %   M-files for solving non-linear programming problems (NLPs) using a
@@ -15,7 +15,7 @@
 %   MIPS is covered by the 3-clause BSD License (see LICENSE for details).
 
 %   MIPS
-%   Copyright (c) 2010-2022, Power Systems Engineering Research Center (PSERC)
+%   Copyright (c) 2010-2024, Power Systems Engineering Research Center (PSERC)
 %   by Ray Zimmerman, PSERC Cornell
 %
 %   This file is part of MIPS.
diff --git a/lib/mipsver.m b/lib/mipsver.m
index 676f638..50d0c46 100644
--- a/lib/mipsver.m
+++ b/lib/mipsver.m
@@ -24,9 +24,9 @@
 %   See https://github.com/MATPOWER/mips for more info.
 
 v = struct( 'Name',     'MIPS', ... 
-            'Version',  '1.5+', ...
+            'Version',  '1.5.1', ...
             'Release',  '', ...
-            'Date',     '16-Apr-2024' );
+            'Date',     '10-May-2024' );
 if nargout > 0
     if nargin > 0
         rv = v;