diff --git a/seminar.md b/seminar.md
index d0cd2b7b152c82ee3253072a5959696d595736d5..db22d395804a3b399c789a2dcca4154db2c1c8be 100644
--- a/seminar.md
+++ b/seminar.md
@@ -52,7 +52,7 @@ and a mattermost channel for chat. To join the mattermost channel:
 |2021-02-01| Takuto Asakura | Towards Grounding of Formulae ([slides](https://drive.google.com/file/d/1JxNKW5M0KKYeBeL6Umsg6ZKBNzdCV_DC/view)) |
 |2021-02-15| - | cancelled |
 |2021-03-01| Bernhard Schröder | Framed proofs -- Linguistic aspects of proof texts and frames |
-|2021-03-15| Peter Koepke | Isabelle-Naproche |
+|2021-03-15| Peter Koepke | Isabelle/Naproche |
 |2021-03-29| André Greiner-Petter | TBD |
 |2021-04-12| ? | ? |
 |2021-04-26| ? | ? |