diff --git a/html_src_files.lst b/html_src_files.lst
index 9071af7361bac0a03e821cbe8a90af46a16ebc8c..17bea0b6d0a8dccebdd2728d90725cfdd9c3abef 100644
--- a/html_src_files.lst
+++ b/html_src_files.lst
@@ -26,8 +26,8 @@
 ./module2/ressources/sequence6_examples/README.org               #     https://www.fun-mooc.fr/courses/course-v1:inria+41016+session02/jump_to_id/827b36e10ddd49239f1c62cc1903951a
 ./module2/ressources/sequence6_examples/README_fr.org               #     https://www.fun-mooc.fr/courses/course-v1:inria+41016+session02/jump_to_id/827b36e10ddd49239f1c62cc1903951a
 ./module2/ressources/python_r_latex.org               #     https://www.fun-mooc.fr/courses/course-v1:inria+41016+session02/jump_to_id/19c2b1de7766484bae73f3ab133463c6
-./module2/exo4/stat_activity.org               #     
-./module2/exo4/stat_activity_fr.org               #     
+./module2/exo4/stat_activity.org               #     https://www.fun-mooc.fr/courses/course-v1:inria+41016+session02/jump_to_id/b52e4bd2198947a8b28b5e648184048c
+./module2/exo4/stat_activity_fr.org               #     https://www.fun-mooc.fr/courses/course-v1:inria+41016+session02/jump_to_id/b52e4bd2198947a8b28b5e648184048c
 ./module2/slides/ressources.org               #     https://www.fun-mooc.fr/courses/course-v1:inria+41016+session02/jump_to_id/36723edefc72488ab44e269501cfc9f8
 ./module2/slides/ressources_fr.org               #     https://www.fun-mooc.fr/courses/course-v1:inria+41016+session02/jump_to_id/36723edefc72488ab44e269501cfc9f8