diff --git a/sushy_tools/emulator/memoize.py b/sushy_tools/emulator/memoize.py
index 6fe9f176..6d7cc7cd 100644
--- a/sushy_tools/emulator/memoize.py
+++ b/sushy_tools/emulator/memoize.py
@@ -111,6 +111,7 @@ class PersistentDict(MutableMapping):
             raise TypeError('Dict is not yet persistent')
 
         with sqlite3.connect(self._dbpath) as connection:
+            connection.execute("pragma journal_mode=wal")
             yield connection.cursor()
 
     @_retry