diff --git a/module3/exo3/exercice_en.Rmd b/module3/exo3/exercice_en.Rmd
index ceb4d7fa423720db65519f69cfda094e3932ab2a..2845041617e54e398cfa67b52a1da2e88af85e36 100644
--- a/module3/exo3/exercice_en.Rmd
+++ b/module3/exo3/exercice_en.Rmd
@@ -7,7 +7,7 @@ output: pdf_document
 
 #### Please note that I am not a Computer Scientist and my programming skills are very limited. 
 
-### Data preprocessing fetch the Data file and check if file already exists
+### Data preprocessing fetch the Data file and check if file already exists.
 
 The data is available from the  Web site of the Scripps Institute