diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index dade76206f7b3e436dffb102ee7c2ed4489e09bb..ddf6a30c2020870276683f101b288ece0f848f6f 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -38,7 +38,7 @@
    "metadata": {},
    "source": [
     "## Buffon’s needle\n",
-    "Applying the method of [Buffons needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the **approximation**"
+    "Applying the method of [Buffon's needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the **approximation**"
    ]
   },
   {