diff --git a/tools/map_syncer/map_syncer_test.py b/tools/map_syncer/map_syncer_test.py
index a946e24..60537cf 100644
--- a/tools/map_syncer/map_syncer_test.py
+++ b/tools/map_syncer/map_syncer_test.py
@@ -322,7 +322,8 @@ def test_sync_files_deletes_only_old(live_maps_url: str, fs: FakeFilesystem) ->
     assert fs.exists(d / "map_old_1.sd7")
     assert not fs.exists(d / "map_old_2.sd7")
     assert cast(
-        Dict[str, int], json.loads(fs.get_object(d / "tombstones.json").contents)
+        Dict[str, int],
+        json.loads(fs.get_object(d / "tombstones.json").contents or "{}"),
     ) == {
         "map_old_1.sd7": initial_tombstones["map_old_1.sd7"],
     }
diff --git a/tools/map_syncer/requirements.txt b/tools/map_syncer/requirements.txt
index 28682ee..ea1b328 100644
--- a/tools/map_syncer/requirements.txt
+++ b/tools/map_syncer/requirements.txt
@@ -1,11 +1,11 @@
-black>=23.3.0
+black>=23.11.0
 isort>=5.12.0
-mypy>=1.4.1
+mypy==1.7.1
 paho-mqtt>=1.6.1
-pyfakefs>=5.2.2
+pyfakefs>=5.3.1
 pytest-httpserver>=1.0.8
-pytest-mock>=3.11.1
-pytest-mqtt>=0.2.0
-pytest>=7.4.0
-ruff>=0.0.277
-types-paho-mqtt>=1.6.0.6
+pytest-mock>=3.12.0
+pytest-mqtt>=0.3.1
+pytest>=7.4.3
+ruff>=0.1.6
+types-paho-mqtt>=1.6.0.7