diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index 2abc97451e0edb397a295b3b05c618b97f8f791a..168e30ac9c28fd720494909d444a2ae3f7b7fa8a 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -23,4 +23,4 @@
  "nbformat_minor": 2
 }
 
-# On the computation of $\pi$
+# On the computation of