diff --git a/38c3-talk.html b/38c3-talk.html
index 4fffac7..a196f8c 100644
--- a/38c3-talk.html
+++ b/38c3-talk.html
@@ -217,7 +217,7 @@ vom Hextivisti-Netzwerk<br />
 </section>
 </foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="24" data-paginate="true" data-footer="Beyond Cryptoparties - wie Aktivistis, [*] und Nerds voneinander lernen können" data-theme="default" lang="de-DE" data-marpit-pagination="24" style="--paginate:true;--footer:Beyond Cryptoparties - wie Aktivistis, [*] und Nerds voneinander lernen können;--theme:default;" data-marpit-pagination-total="41">
 <h3 id="signal">Signal</h3>
-<p><img src="images/signal-was-here.jpg" alt="Signal was here" /></p>
+<p><img src="images/signal-was-here.png" alt="Signal was here" /></p>
 <footer>Beyond Cryptoparties - wie Aktivistis, [*] und Nerds voneinander lernen können</footer>
 </section>
 </foreignObject></svg><svg data-marpit-svg="" viewBox="0 0 1280 720"><foreignObject width="1280" height="720"><section id="25" data-paginate="true" data-footer="Beyond Cryptoparties - wie Aktivistis, [*] und Nerds voneinander lernen können" data-theme="default" lang="de-DE" data-marpit-pagination="25" style="--paginate:true;--footer:Beyond Cryptoparties - wie Aktivistis, [*] und Nerds voneinander lernen können;--theme:default;" data-marpit-pagination-total="41">
diff --git a/38c3-talk.md b/38c3-talk.md
index b2162c5..86f3135 100644
--- a/38c3-talk.md
+++ b/38c3-talk.md
@@ -262,7 +262,7 @@ Wie viel bieten Sie?
 
 ### Signal
 
-![Signal was here](images/signal-was-here.jpg)
+![Signal was here](images/signal-was-here.png)
 
 ---