diff --git a/introduction-to-reverse-engineering/build-presentation.sh b/introduction-to-reverse-engineering/build-presentation.sh
index f649204..42adf1d 100755
--- a/introduction-to-reverse-engineering/build-presentation.sh
+++ b/introduction-to-reverse-engineering/build-presentation.sh
@@ -1,3 +1,7 @@
 #!/usr/bin/env bash
 
-pandoc -s --mathml -i -t revealjs  reverse_engineering.md -o presentation.html -V theme=dracula
+# pandoc -s --mathml -i -t revealjs  reverse_engineering.md -o presentation.html -V theme=dracula
+pandoc -s --mathml -i -t revealjs reverse_engineering.md \
+  -V theme=dracula \
+  -V revealjs-url=https://unpkg.com/reveal.js@4 \
+  -o presentation.html
diff --git a/introduction-to-reverse-engineering/images/Gruenwelt_Lieferbestaetigung.pdf b/introduction-to-reverse-engineering/images/Gruenwelt_Lieferbestaetigung.pdf
new file mode 100644
index 0000000..fcabacd
Binary files /dev/null and b/introduction-to-reverse-engineering/images/Gruenwelt_Lieferbestaetigung.pdf differ
diff --git a/introduction-to-reverse-engineering/presentation.html b/introduction-to-reverse-engineering/presentation.html
index 343009f..9198ba5 100644
--- a/introduction-to-reverse-engineering/presentation.html
+++ b/introduction-to-reverse-engineering/presentation.html
@@ -3,13 +3,13 @@
 <head>
   <meta charset="utf-8">
   <meta name="generator" content="pandoc">
-  <meta name="author" content="Stefan Friese">
+  <meta name="author" content="Stefan Etringer">
   <title>Introduction to Reverse Engineering</title>
   <meta name="apple-mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
   <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
-  <link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reset.css">
-  <link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reveal.css">
+  <link rel="stylesheet" href="https://unpkg.com/reveal.js@4/dist/reset.css">
+  <link rel="stylesheet" href="https://unpkg.com/reveal.js@4/dist/reveal.css">
   <style>
     .reveal .sourceCode {  /* see #7635 */
       overflow: visible;
@@ -29,8 +29,9 @@
       vertical-align: middle;
     }
     /* CSS for syntax highlighting */
+    html { -webkit-text-size-adjust: 100%; }
     pre > code.sourceCode { white-space: pre; position: relative; }
-    pre > code.sourceCode > span { line-height: 1.25; }
+    pre > code.sourceCode > span { display: inline-block; line-height: 1.25; }
     pre > code.sourceCode > span:empty { height: 1.2em; }
     .sourceCode { overflow: visible; }
     code.sourceCode > span { color: inherit; text-decoration: inherit; }
@@ -41,7 +42,7 @@
     }
     @media print {
     pre > code.sourceCode { white-space: pre-wrap; }
-    pre > code.sourceCode > span { display: inline-block; text-indent: -5em; padding-left: 5em; }
+    pre > code.sourceCode > span { text-indent: -5em; padding-left: 5em; }
     }
     pre.numberSource code
       { counter-reset: source-line 0; }
@@ -93,7 +94,7 @@
     code span.vs { color: #4070a0; } /* VerbatimString */
     code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warning */
   </style>
-  <link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/theme/dracula.css" id="theme">
+  <link rel="stylesheet" href="https://unpkg.com/reveal.js@4/dist/theme/dracula.css" id="theme">
 </head>
 <body>
   <div class="reveal">
@@ -101,7 +102,7 @@
 
 <section id="title-slide">
   <h1 class="title">Introduction to Reverse Engineering</h1>
-  <p class="author">Stefan Friese</p>
+  <p class="author">Stefan Etringer</p>
   <p class="date">02 November, 2023</p>
 </section>
 
@@ -134,8 +135,8 @@ topics?</p>
 <section class="slide level1">
 
 <h2 id="reversing-is-work">Reversing is Work</h2>
-<p>Work is a product of power by time.<br />
-<code>P</code> is your power to solve an issue.</p>
+<p>Work is a product of power by time. <code>P</code> is your power to
+solve an issue.</p>
 <p><code>W = P x t</code></p>
 <p>The smarter you tackle work, the less time you need to solve an
 issue.</p>
@@ -369,12 +370,12 @@ Ghidra</a></li>
     </div>
   </div>
 
-  <script src="https://unpkg.com/reveal.js@^4//dist/reveal.js"></script>
+  <script src="https://unpkg.com/reveal.js@4/dist/reveal.js"></script>
 
   <!-- reveal.js plugins -->
-  <script src="https://unpkg.com/reveal.js@^4//plugin/notes/notes.js"></script>
-  <script src="https://unpkg.com/reveal.js@^4//plugin/search/search.js"></script>
-  <script src="https://unpkg.com/reveal.js@^4//plugin/zoom/zoom.js"></script>
+  <script src="https://unpkg.com/reveal.js@4/plugin/notes/notes.js"></script>
+  <script src="https://unpkg.com/reveal.js@4/plugin/search/search.js"></script>
+  <script src="https://unpkg.com/reveal.js@4/plugin/zoom/zoom.js"></script>
 
   <script>
 
diff --git a/introduction-to-reverse-engineering/reverse_engineering.md b/introduction-to-reverse-engineering/reverse_engineering.md
index 506090c..f714361 100644
--- a/introduction-to-reverse-engineering/reverse_engineering.md
+++ b/introduction-to-reverse-engineering/reverse_engineering.md
@@ -1,5 +1,5 @@
 % Introduction to Reverse Engineering
-% Stefan Friese
+% Stefan Etringer
 % 02 November, 2023
 
 ---
@@ -13,7 +13,7 @@
 
 ## How Do You Reverse
 
-Reverse Engineering demands a lot of knowledge in multiple fields.  
+Reverse Engineering demands a lot of knowledge in multiple fields.
 
 **Some topics are**
 
@@ -31,7 +31,7 @@ How do you reverse engineer without knowing little about these topics?
 
 ## Reversing is Work
 
-Work is a product of power by time.  
+Work is a product of power by time.
 `P` is your power to solve an issue.
 
 `W = P x t`
@@ -198,7 +198,7 @@ f"{b}{a}"
 
 ---
 
-## Packing 
+## Packing
 
 Compress binary data