diff --git a/figures/blender.png b/figures/blender.png
index bea1dfc..1464c86 100644
Binary files a/figures/blender.png and b/figures/blender.png differ
diff --git a/figures/gentoo.png b/figures/gentoo.png
index 8034dd9..16c434b 100644
Binary files a/figures/gentoo.png and b/figures/gentoo.png differ
diff --git a/figures/openzfs-logo.png b/figures/openzfs-logo.png
index d38695b..6bd9fc7 100644
Binary files a/figures/openzfs-logo.png and b/figures/openzfs-logo.png differ
diff --git a/figures/python.png b/figures/python.png
index 66ae7f8..d1886a4 100644
Binary files a/figures/python.png and b/figures/python.png differ
diff --git a/tex/main.tex b/tex/main.tex
index 7b0b944..d664c56 100644
--- a/tex/main.tex
+++ b/tex/main.tex
@@ -335,7 +335,7 @@ services.buildbot-nix.master = {
 
 \begin{frame}
 	\centering
-	\imagewithtitle{\Large Cachix}{example-image-a}
+	\imagewithtitle{\Large Cachix}{../figures/cachix.png}
 \end{frame}
 
 \begin{frame}
@@ -388,6 +388,7 @@ lock_file = "flake.lock"
 		Questions? \\
 		\includegraphics[width=0.50\textwidth]{../figures/buildbot-nix-qr.png}
 	\end{center}
+	\note[item]{thank users of buildbot-nix for the images and also for reporting bugs when they happen}
 
 	%% \includegraphics[width=0.35\textwidth]{../figures/upstream-qr.png}\hspace{1.5em}%
 \end{frame}