diff --git a/1_understanding_a_computer.Rmd b/1_understanding_a_computer.Rmd
index c85d120baebcbd380c83a3cec2c06b200cb0f20d..2e03d5448962032714c9f941f875fd005a73f441 100644
--- a/1_understanding_a_computer.Rmd
+++ b/1_understanding_a_computer.Rmd
@@ -160,7 +160,7 @@ You can find a [list of software licenses](https://www.gnu.org/licenses/license-
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-See this [presentation](https://plmlab.math.cnrs.fr/gdurif/presentation_foss/-/blob/main/presentation/presentation_DURIF_foss.pdf) (in french) for a quick introduction about **software licence** and **free/open source softare**.
+See this [presentation](https://plmlab.math.cnrs.fr/gdurif/presentation_foss/-/blob/main/presentation/presentation_DURIF_foss.pdf) (in french) for a quick introduction about **software license** and **free/open source software**.
 
 
 [Instead of installing GNU/Linux on your computer, you are going to learn to use the IFB Cloud.](./2_using_the_ifb_cloud.html)