diff --git a/api/core/database.py b/api/core/database.py
index 8a7eaf4..f9ed534 100644
--- a/api/core/database.py
+++ b/api/core/database.py
@@ -68,7 +68,7 @@ def __init__(
     ):
         if not db_url.startswith("sqlite:///"):
             raise ValueError(f"SQLiteRDSJobQueue requires SQLite DB URL, got: {db_url}")
-        if not ((s3_client is None) == (s3_bucket is None)):
+        if not (bool(s3_client) == bool(s3_bucket)):
             raise ValueError(
                 "Both s3_client and s3_bucket must be provided for S3 backup/restore, or both must be None."
             )
diff --git a/pyproject.toml b/pyproject.toml
index 629ccf8..4cb96ce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "api"
-version = "0.3.0"
+version = "0.3.1"
 description = "User-facing API of DECODE OpenCloud."
 authors = ["Arthur Jaques <arthur.jaques@hispeed.ch>"]
 readme = "README.md"