diff --git a/presentation/python.pdf b/presentation/python.pdf
index 446fc34d78ca5c5320c403cdb71e44813bd28d79..6b65de7f8662c3c3e4a240cf327fb7150c10da52 100644
Binary files a/presentation/python.pdf and b/presentation/python.pdf differ
diff --git a/presentation/python.tex b/presentation/python.tex
index e896ee28ba64cc2992683b30d37b6a275a1e9497..52ba9fd17b839876fda1c3ab245636ce64943620 100644
--- a/presentation/python.tex
+++ b/presentation/python.tex
@@ -191,7 +191,7 @@
 \end{frame}
 
 
-\begin{frame}{Dictionary}
+\begin{frame}{Dictionaries}
     \includegraphics[width=0.9\linewidth]{code-dictionaries}
 \end{frame}
 
@@ -290,7 +290,7 @@
 	\centering    \includegraphics[width=0.4\linewidth]{plot1}
 \end{frame}
 
-\begin{frame}{Matplotlib II}
+\begin{frame}{Data visualization with Matplotlib II}
 	\includegraphics[width=0.9\linewidth]{code-matplotlib2}
 	
 	\centering    \includegraphics[width=0.4\linewidth]{plot2}