diff --git a/assets/img/page_der-verein/tst-logo.jpg b/assets/img/page_der-verein/tst-logo.jpg
new file mode 100644
index 0000000..230ba8d
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diff --git a/assets/img/page_der-verein/tst-logo.png b/assets/img/page_der-verein/tst-logo.png
deleted file mode 100644
index 89e6ba8..0000000
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diff --git a/assets/img/page_der-verein/waldHotel-logo.jpg b/assets/img/page_der-verein/waldHotel-logo.jpg
new file mode 100644
index 0000000..2850e78
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diff --git a/assets/img/page_der-verein/waldHotel-logo.png b/assets/img/page_der-verein/waldHotel-logo.png
deleted file mode 100644
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diff --git a/unterstuetzer.html b/unterstuetzer.html
index eada18b..3ab8cae 100644
--- a/unterstuetzer.html
+++ b/unterstuetzer.html
@@ -11,7 +11,7 @@ permalink: /unterstuetzer/
         <h5 class="light-text">F&ouml;rdermitglieder / Sponsoren</h5>
         <div class="row">
             <div class="col s12 m10 l4 text-center">
-                <a href="https://tstgmbh.com" target="_blank"><img src="{{ '/assets/img/page_der-verein/tst-logo.png' | relative_url}}" alt="Logo TST GmbH"></a>
+                <a href="https://tstgmbh.com" target="_blank"><img src="{{ '/assets/img/page_der-verein/tst-logo.jpg' | relative_url}}" alt="Logo TST GmbH"></a>
             </div>
             <div class="col s12 m10 l4 text-center">
                 <a href="http://trowista.de" target="_blank"><img src="{{ '/assets/img/page_der-verein/trowista-logo.jpg' | relative_url}}" alt="Logo Trowista GmbH"></a>
@@ -22,7 +22,7 @@ permalink: /unterstuetzer/
         </div>
         <div class="row">
             <div class="col s12 m10 l4 offset-l4 text-center">
-                <a href="https://www.wald-hotel.com" target="_blank"><img src="{{ '/assets/img/page_der-verein/waldHotel-logo.png' | relative_url}}" alt="Logo Wald-Hotel Troisdorf"></a>
+                <a href="https://www.wald-hotel.com" target="_blank"><img src="{{ '/assets/img/page_der-verein/waldHotel-logo.jpg' | relative_url}}" alt="Logo Wald-Hotel Troisdorf"></a>
             </div>
         </div>
         <br>
@@ -40,4 +40,4 @@ permalink: /unterstuetzer/
             </div>
         </div>
     </section>
-</div>
\ No newline at end of file
+</div>