diff --git a/README.md b/README.md
index f61799256fd0cdfe34d233b449a7c1c3c4261721..55d4bd5d9a978a0de6b41a45006287bef219832d 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,7 @@ Non functional (expected values are $`5.085`$ and $`-0.1156`$)
 | R        |            3.5.1 | ggplot2_3.0.0                                                 | org-mode | GNU/Linux OpenSuse Leap 15.0  | don't know                               | don't know                                | don't know                   | don't know | don't kn         | [org](https://app-learninglab.inria.fr/gitlab/moocrr-session1/moocrr-reproducibility-study/blob/master/src/R/challenger_R_org.org), [pdf](https://app-learninglab.inria.fr/gitlab/moocrr-session1/moocrr-reproducibility-study/blob/master/src/R/challenger_R_org.pdf)                                                                                       | JFM         |
 | R        |            3.5.1 | ggplot2 3.0.0 rmarkdown 1.10                                  | RStudio | Windows 7 x64                  | Identical                                | Identical                                 | Identical                    | Identical | Identical         | [html](src/R/study_vd.html)                                                                                                                                                                                                                                                                                                                                | V.Dordonnat        |
 | R         |       3.5.1   | ggplot2_3.1.0 rmarkdown 1.10                                  | RStudio| Windows 8 x64                    | Identical                                 | Identical                                 | Identical                     | Identical | Identical     |   [Rmd] (src/R/challenger_VL.Rmd)[html] (src/R/Challenger_VL.html)                                                                                                                                                                                                                                                                                            | V Laucou  |
+| R        |            3.4.3 | ggplot2 2.2.1                                                 | RStudio | macOS 10.14.1                  | Identical                                | Identical                                 | Identical                    | Identical | Identical         | [Rmd](https://app-learninglab.inria.fr/gitlab/08e11bfd74562785ba326e1579ddc8bb/mooc-rr/blob/master/module4/Exo%201.Rmd)                                                                                                                                                                                                                                   | J. Simo,  | 
 **Python** |                  |                                                               |         |                                |                                          |                                           |                              |           |                   |                                                                                                                                                                                                                                                                                                                                                            |             |
 | Python   |            3.6.4 | statsmodels 0.9.0 numpy 1.13.3 pandas 0.22.0 matplotlib 2.2.2 | Jupyter | Linux Ubuntu 4.4.0-116-generic | Identical                                | Identical                                 | Identical                    | Identical | Similar           | [ipynb](src/Python3/challenger.ipynb), [pdf](src/Python3/challenger_ubuntuMOOC_alegrand.pdf)                                                                                                                                                                                                                                                                 | A. Legrand  |
 | Python   |            3.6.4 | statsmodels 0.9.0 numpy 1.13.3 pandas 0.22.0 matplotlib 2.2.3 | Jupyter | Linux Ubuntu 4.4.0-116-generic | Identical                                | Identical                                 | Identical                    | Identical | Similar           | [ipynb](https://app-learninglab.inria.fr/gitlab/209efe97d845ea4b57491275c640a3d4/mooc-rr/blob/master/module4/challenger.ipynb), [pdf](https://app-learninglab.inria.fr/gitlab/209efe97d845ea4b57491275c640a3d4/mooc-rr/blob/master/module4/challenger-jupiter.pdf)                                                                                           | N. Maurin   |