diff --git a/labs/Lab3.pdf b/labs/Lab3.pdf
index 4e6ea8d..eefd2a3 100644
Binary files a/labs/Lab3.pdf and b/labs/Lab3.pdf differ
diff --git a/labs/Lab3.tex b/labs/Lab3.tex
index 3acb0a6..3e204b5 100644
--- a/labs/Lab3.tex
+++ b/labs/Lab3.tex
@@ -130,7 +130,7 @@ \subsection*{What goes in a commit log}
 
 \section*{Clarifications}
 
-\paragraph{Can you clearly tell me which lectures are relevant to this lab?} Lectures 22 and 23.
+\paragraph{Can you clearly tell me which lectures are relevant to this lab?} Lectures 21 and 22.
 
 \paragraph{nvcc: command not found.} Make sure you're on an \texttt{ecetesla} machine (or maybe \texttt{eceubuntu4}).