diff --git a/presentations/software-engineering-basics/software-engineering-basics.pdf b/presentations/software-engineering-basics/software-engineering-basics.pdf
index 62559f5..f26a8eb 100644
Binary files a/presentations/software-engineering-basics/software-engineering-basics.pdf and b/presentations/software-engineering-basics/software-engineering-basics.pdf differ
diff --git a/presentations/software-engineering-basics/software-engineering-basics.tex b/presentations/software-engineering-basics/software-engineering-basics.tex
index 3e91321..085f80f 100644
--- a/presentations/software-engineering-basics/software-engineering-basics.tex
+++ b/presentations/software-engineering-basics/software-engineering-basics.tex
@@ -173,7 +173,7 @@ Namespaces are one honking great idea -- let's do more of those!
                     \item TST: addition or modification of tests
                 \end{itemize}
 
-                Source: \href{https://docs.scipy.org/doc/numpy-1.13.0/dev/gitwash/development_workflow.html}{Scipy Development Workflow}
+                Source: \href{https://docs.scipy.org/doc/numpy-1.13.0/dev/gitwash/development_workflow.html}{Scipy Docs}
             }
             \only<3>{
                 \begin{itemize}
@@ -186,6 +186,16 @@ Namespaces are one honking great idea -- let's do more of those!
 \end{frame}
 
 
+\begin{frame}{commit ammend}
+    \texttt{\$ git commit --amend}
+
+    \begin{itemize}
+        \item Add to last commit / change message
+        \item Only on feature branch as it might require force-push!
+    \end{itemize}
+\end{frame}
+
+
 \begin{frame}{commit squashing}
     \begin{columns}
         \begin{column}{0.5\textwidth}