diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 2d41f50..b52a923 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -89,3 +89,15 @@ jobs:
         with:
           name: CTAN-${{ matrix.engine }}
           path: '*.tar.gz'
+  changelog:
+    name: CHANGELOG.md
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+        with:
+          show-progress: ''
+      - uses: jbangdev/jbang-action@v0.110.1
+        with:
+          script: com.github.nbbrd.heylogs:heylogs-cli:0.7.2:bin
+          scriptargs: "check CHANGELOG.md"
diff --git a/.gitignore b/.gitignore
index e365d6b..cd09f45 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 lni.pdf
-lni-author-template.pdf
-lni-paper-example-de.pdf
+lni-author-template*.pdf
+lni-paper-example-*.pdf
 
 mybibfile.bib
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7f1634..1388fe2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,14 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
-The format is based on [Keep a Changelog](http://keepachangelog.com/).
+The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
 ## [1.8] - 2023-07-10
 
 ### Added
 
 - Added option `anonymous` for anonymizing an article. [#100](https://github.com/gi-ev/LNI/pull/100)
+- Added `\pdfoutput=1` to fix compatibility with [arXiv](https://arxiv.org/). [#81](https://github.com/gi-ev/LNI/issues/81)
 
 ### Changed
 
@@ -97,7 +98,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
 ### Added
 
-- New option `nofonts` to use the class file on older systems ([#53](https://github.com/gi-ev/LNI/issues/52))
+- New option `nofonts` to use the class file on older systems ([#53](https://github.com/gi-ev/LNI/issues/53))
 
 ### Changed
 
diff --git a/lni-author-template.tex b/lni-author-template.tex
index 3e9bb4a..0d9269a 100644
--- a/lni-author-template.tex
+++ b/lni-author-template.tex
@@ -2,14 +2,18 @@
 % !TeX program = pdflatex
 % !BIB program = bibtex
 
-%%% Um einen Artikel auf deutsch zu schreiben, genügt es die Klasse ohne
-%%% Parameter zu laden.
-%%% Zur Anonymisierung kann die ``anonymous'' Option genutzt werden.
-\documentclass[]{lni}
+\RequirePackage{iftex}\ifluatex\else
+\pdfoutput=1
+\fi
 %%% To write an article in English, please use the option ``english'' in order
 %%% to get the correct hyphenation patterns and terms.
 %%% \documentclass[english]{class}
 %%% for anonymizing an article you can use the ``anonymous'' option.
+%%%
+%%% Um einen Artikel auf deutsch zu schreiben, genügt es die Klasse ohne
+%%% Parameter zu laden.
+%%% Zur Anonymisierung kann die ``anonymous'' Option genutzt werden.
+\documentclass[]{lni}
 %%
 \begin{document}
 %%% Mehrere Autoren werden durch \and voneinander getrennt.
diff --git a/lni-paper-example-de.tex b/lni-paper-example-de.tex
index 6e3452d..fb7118a 100644
--- a/lni-paper-example-de.tex
+++ b/lni-paper-example-de.tex
@@ -1,6 +1,9 @@
 % !TeX encoding = UTF-8
 % !TeX spellcheck = de_DE
 
+\RequirePackage{iftex}\ifluatex\else
+\pdfoutput=1
+\fi
 
 %% Dies gibt Warnungen aus, sollten veraltete LaTeX-Befehle verwendet werden
 \RequirePackage[l2tabu, orthodox]{nag}
diff --git a/lni.cls b/lni.cls
index f07b44a..84e2a05 100644
--- a/lni.cls
+++ b/lni.cls
@@ -561,7 +561,7 @@
 \g@addto@macro{\UrlBreaks}{\UrlOrds}
 \RequirePackage{xspace}
 \ifusehyperref
-   \AtEndPreamble{%
+   \AddToHook{env/document/begin}[cid/loadhyp]{
       \RequirePackage[bookmarks=false]{hyperref}
       \hypersetup{%
          pdfdisplaydoctitle,%
@@ -569,11 +569,8 @@
          allcolors=black,%
          pdfstartview=Fit,%
       }%
-%%%      \pdfstringdefDisableCommands{%
-%%%         \def\unskip{}%
-%%%         \renewcommand{\footnote}[1]{}%
-%%%      }%
    }%
+   \DeclareHookRule{env/document/begin}{cid/loadhyp}{before}{biblatex}
 \else
    \providecommand{\texorpdfstring}[2]{#2}%
 \fi%
diff --git a/lni.dtx b/lni.dtx
index 0ebb76e..387d4cc 100644
--- a/lni.dtx
+++ b/lni.dtx
@@ -1472,7 +1472,7 @@ This work consists of the file  lni.dtx
 %    \end{macrocode}
 %    \begin{macrocode}
 \ifusehyperref
-   \AtEndPreamble{%
+   \AddToHook{env/document/begin}[cid/loadhyp]{
       \RequirePackage[bookmarks=false]{hyperref}
       \hypersetup{%
          pdfdisplaydoctitle,%
@@ -1480,11 +1480,8 @@ This work consists of the file  lni.dtx
          allcolors=black,%
          pdfstartview=Fit,%
       }%
-%%%      \pdfstringdefDisableCommands{%
-%%%         \def\unskip{}%
-%%%         \renewcommand{\footnote}[1]{}%
-%%%      }%
    }%
+   \DeclareHookRule{env/document/begin}{cid/loadhyp}{before}{biblatex}
 \else
    \providecommand{\texorpdfstring}[2]{#2}%
 \fi%
@@ -3001,14 +2998,19 @@ EXECUTE {end.bib}
 % % !TeX program = pdflatex
 % % !BIB program = biber
 % % !TeX spellcheck = de-DE
-%%% Um einen Artikel auf deutsch zu schreiben, genügt es die Klasse ohne
-%%% Parameter zu laden.
-%%% Zur Anonymisierung kann die ``anonymous'' Option genutzt werden.
-\documentclass[]{lni}
+% Needs to be written in the first 5 lines, because of arXiv's requirements
+\RequirePackage{iftex}\ifluatex\else
+\pdfoutput=1
+\fi
 %%% To write an article in English, please use the option ``english'' in order
 %%% to get the correct hyphenation patterns and terms.
 %%% \documentclass[english]{class}
 %%% for anonymizing an article you can use the ``anonymous'' option.
+%%%
+%%% Um einen Artikel auf deutsch zu schreiben, genügt es die Klasse ohne
+%%% Parameter zu laden.
+%%% Zur Anonymisierung kann die ``anonymous'' Option genutzt werden.
+\documentclass[]{lni}
 %%
 \begin{document}
 %%% Mehrere Autoren werden durch \and voneinander getrennt.
@@ -3145,6 +3147,10 @@ Schlagwort1 \and Schlagwort2 %Keyword1 \and Keyword2
 % % !TeX program = pdflatex
 % % !BIB program = biber
 % % !TeX spellcheck = de-DE
+% Needs to be written in the first 5 lines, because of arXiv's requirements
+\RequirePackage{iftex}\ifluatex\else
+\pdfoutput=1
+\fi
 
 %% Dies gibt Warnungen aus, sollten veraltete LaTeX-Befehle verwendet werden
 \RequirePackage[l2tabu, orthodox]{nag}