diff --git a/module4/src_R_challenger.Rmd b/module4/src_R_challenger.Rmd
index d2b9f2d75d7e3cc6294e0f37fe42ff1467e26e83..b3994c39310c22a56b87a9b580898032ed8d4b4b 100644
--- a/module4/src_R_challenger.Rmd
+++ b/module4/src_R_challenger.Rmd
@@ -21,6 +21,7 @@ sessionInfo()
 
 Here are the available libraries
 ```{r}
+library(devtools)
 devtools::session_info()
 ```
 
@@ -28,9 +29,11 @@ devtools::session_info()
 # Loading and inspecting data
 Let's start by reading data:
 ```{r}
-data = read.csv("https://app-learninglab.inria.fr/moocrr/gitlab/moocrr-session3/moocrr-reproducibility-study/tree/master/data/shuttle.csv",header=T)
+url_data <- "https://app-learninglab.inria.fr/moocrr/gitlab/moocrr-session3/moocrr-reproducibility-study/raw/master/data/shuttle.csv"
+data = read.csv(url_data, header=T)
 data
 ```
+*J'ai modifié l'url car celui d'origine n'étais plus le bon. J'ai trouvé ce nouvel url grâce au forum du cours.*
 
 We know from our previous experience on this data set that filtering data is a really bad idea. We will therefore process it as such.