diff --git a/e4e_data_management/core.py b/e4e_data_management/core.py
index 4609f5c..96fa9b4 100644
--- a/e4e_data_management/core.py
+++ b/e4e_data_management/core.py
@@ -198,6 +198,8 @@ def activate(self,
         else:
             self.active_mission = None
 
+        self.save()
+
     def add(self, paths: Iterable[Path],
             readme: bool = False,
             destination: Optional[Path] = None) -> None: