diff --git a/pyphare/pyphare/pharesee/run/run.py b/pyphare/pyphare/pharesee/run/run.py
index c965696f0..ea2883d80 100644
--- a/pyphare/pyphare/pharesee/run/run.py
+++ b/pyphare/pyphare/pharesee/run/run.py
@@ -284,6 +284,7 @@ def all_times(self):
             for it, t in enumerate(time_keys):
                 time[it] = float(t)
             ts[quantities_per_file[basename]] = time
+            ff.close()
         return ts
 
     def times(self, qty):