diff --git a/build_info.json b/build_info.json
index 93819ed..759000e 100644
--- a/build_info.json
+++ b/build_info.json
@@ -1,8 +1,8 @@
 {
     "build_time": "",
     "source files": {
-        "version": "v2.9-10-ge8be9fc",
-        "commit": "e8be9fcb16382e408aad9e722cad99df641766ae",
+        "version": "v2.9-11-g0b63168",
+        "commit": "0b631683d722faf7b0b42af58c22a5648757eba9",
         "dirty": false
     },
     "pytex": {
@@ -297,6 +297,17 @@
             "md5sum": "d826151a8c89f3d9e7e7fa3d35d51a84",
             "dirty": false
         },
+        {
+            "name": "quiver/mkessler-quiver.sty",
+            "source file": "quiver/quiver.pysty",
+            "build time": "2022/02/28 15:03",
+            "source version": "v2.9-11-g0b63168",
+            "source commit hash": "0b631683d722faf7b0b42af58c22a5648757eba9",
+            "pytex version": "v1.2.0-31-gc9bb0e8",
+            "pytex commit hash": "c9bb0e87c91beae3e17a829603e4459cf804ec51",
+            "md5sum": "40b034c98f9c214ad8ee1bc1dc4542b3",
+            "dirty": false
+        },
         {
             "name": "lecture-notes/script/mkessler-script.cls",
             "source file": "lecture-notes/script/script.pycls",
diff --git a/quiver/mkessler-quiver.sty b/quiver/mkessler-quiver.sty
new file mode 100644
index 0000000..0958fe9
--- /dev/null
+++ b/quiver/mkessler-quiver.sty
@@ -0,0 +1,110 @@
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Copyright © 2022 Maximilian Keßler
+% 
+% This work may be distributed and/or modified
+% 
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU General Public License
+% 
+% Distribution under conditions of the LaTeX Project Public License,
+% requires either version 1.3 of this license or (at your option)
+% any later version.
+% The latest version of this license is in
+%    http://www.latex-project.org/lppl.txt
+% and version 1.3 or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+% 
+% This work has the LPPL maintenance status \`maintained'.
+% 
+% The Current Maintainer of this work is Maximilian Keßler.
+% 
+% 
+% Distribution under the GNU General Public License requires either
+% version 3 or (at your opinion) any later version.
+% 
+% This package has been generated by PyTeX, available at
+%    https://github.com/kesslermaximilian/PyTeX
+% and built from source file 'quiver.pysty'.
+% It is STRONGLY DISCOURAGED to edit this source file directly, since local
+% changes will not be versioned by Git and overwritten by the next build. Always
+% edit the source file and build the package again.
+% 
+% Build details:
+%   PyTeX version: v1.2.0-31-gc9bb0e8 (commit c9bb0e8)
+%   Source code version: v2.9-11-g0b63168 (commit 0b63168)
+% 
+% This LaTeX package is free software and is dual-licensed
+% under the LPPLv1.3c and the GPLv3 licenses.
+% You may use it freely for your purposes.
+% The latest version of the package sources can be obtained
+% via GitLab under
+%    https://gitlab.com/latexci/packages/LatexPackages
+% The latest version of the built packages can be obtained via GitLab under
+%    https://gitlab.com/latexci/packages/LatexPackagesBuild
+% For further information see the urls above.
+% Reportings of bugs, suggestions and improvements are welcome, see the README
+% at the Git repository for further information.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%MIT License
+% 
+% Copyright (c) 2018 varkor
+% 
+% Permission is hereby granted, free of charge, to any person obtaining a copy
+% of this software and associated documentation files (the "Software"), to deal
+% in the Software without restriction, including without limitation the rights
+% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+% copies of the Software, and to permit persons to whom the Software is
+% furnished to do so, subject to the following conditions:
+% 
+% The above copyright notice and this permission notice shall be included in all
+% copies or substantial portions of the Software.
+% 
+% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+% SOFTWARE. *** quiver ***
+%
+%
+% A package for drawing commutative diagrams exported from https://q.uiver.app.
+%
+% This package is currently a wrapper around the `tikz-cd` package, importing necessary TikZ
+% libraries, and defining a new TikZ style for curves of a fixed height.
+%
+% Version: 1.2.1
+% Authors:
+% - varkor (https://github.com/varkor)
+% - AndréC (https://tex.stackexchange.com/users/138900/andr%C3%A9c)
+
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{quiver}[2021/01/11 quiver]
+
+% `tikz-cd` is necessary to draw commutative diagrams.
+\RequirePackage{tikz-cd}
+% `amssymb` is necessary for `\lrcorner` and `\ulcorner`.
+\RequirePackage{amssymb}
+% `calc` is necessary to draw curved arrows.
+\usetikzlibrary{calc}
+% `pathmorphing` is necessary to draw squiggly arrows.
+\usetikzlibrary{decorations.pathmorphing}
+
+% A TikZ style for curved arrows of a fixed height, due to AndréC.
+\tikzset{curve/.style={settings={#1},to path={(\tikztostart)
+    .. controls ($(\tikztostart)!\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
+    and ($(\tikztostart)!1-\pv{pos}!(\tikztotarget)!\pv{height}!270:(\tikztotarget)$)
+    .. (\tikztotarget)\tikztonodes}},
+    settings/.code={\tikzset{quiver/.cd,#1}
+        \def\pv##1{\pgfkeysvalueof{/tikz/quiver/##1}}},
+    quiver/.cd,pos/.initial=0.35,height/.initial=0}
+
+% TikZ arrowhead/tail styles.
+\tikzset{tail reversed/.code={\pgfsetarrowsstart{tikzcd to}}}
+\tikzset{2tail/.code={\pgfsetarrowsstart{Implies[reversed]}}}
+\tikzset{2tail reversed/.code={\pgfsetarrowsstart{Implies}}}
+% TikZ arrow styles.
+\tikzset{no body/.style={/tikz/dash pattern=on 0 off 1mm}}
+
+\endinput