diff --git a/kano_updater/apt_wrapper.py b/kano_updater/apt_wrapper.py
index 3056dcdd..00d3826c 100644
--- a/kano_updater/apt_wrapper.py
+++ b/kano_updater/apt_wrapper.py
@@ -83,6 +83,10 @@ def __init__(self):
         else:
             AptWrapper._singleton_instance = self
 
+        self._cache = None
+        self.refresh_instance()
+
+    def refresh_instance(self):
         apt.apt_pkg.init_config()
 
         # We disable downloading translations, because we don't have them
diff --git a/kano_updater/scenarios.py b/kano_updater/scenarios.py
index 9315b0bd..db9f232d 100644
--- a/kano_updater/scenarios.py
+++ b/kano_updater/scenarios.py
@@ -1048,6 +1048,7 @@ def beta_3_15_0_to_beta_3_16_0(self, progress):
         # Proceeding to update to 4.x.x - add new sources and relaunch
         shutil.copy(REFERENCE_STRETCH_LIST, STRETCH_MIGRATION_LIST)
         apt_handle = AptWrapper.get_instance()
+        apt_handle.refresh_instance()
         apt_handle.update(progress)
         progress.relaunch()