Update app.py

app.py

@@ -189,7 +189,7 @@ class SADCP_Viewer(param.Parameterized):
         )
         self.update_name_options()
 
-    @param.depends("year_slider.value", "file_dropdown.value", watch=False)
+    @param.depends("year_slider.value", "file_dropdown.value", watch=True)
     def update_name_options(self):
         start_year, end_year = self.year_slider.value
         mask = (self.df["year"] >= start_year) & (self.df["year"] <= end_year)