diff --git a/src/_zkapauthorizer/storage_common.py b/src/_zkapauthorizer/storage_common.py
index ef1215d9dceacb3a28de204388e76dc604283ca9..43bc043d0932c3fa82cb4705543fa11902eabac7 100644
--- a/src/_zkapauthorizer/storage_common.py
+++ b/src/_zkapauthorizer/storage_common.py
@@ -16,6 +16,10 @@
 Functionality shared between the storage client and server.
 """
 
+from __future__ import (
+    division,
+)
+
 from base64 import (
     b64encode,
 )