diff --git a/slides/fractures.md b/slides/fractures.md
index d2a4a234bdabe34ebb6415eaf50fb7ba03dc7975..5f859afbf214ae2cc06d5dcdca6126326c73e484 100644
--- a/slides/fractures.md
+++ b/slides/fractures.md
@@ -81,7 +81,7 @@ $$
 
 # Fracture exercise
 
-## Buyoancy-driven gas migration
+## Buoyancy-driven gas migration
 
 <img src=img/fractures_exercise_solution.gif width="50%">