diff --git a/snuba/manual_jobs/manifest_reader.py b/snuba/manual_jobs/manifest_reader.py
index 43dd8b6368..9756f0c5d2 100644
--- a/snuba/manual_jobs/manifest_reader.py
+++ b/snuba/manual_jobs/manifest_reader.py
@@ -5,7 +5,8 @@
 
 
 class _ManifestReader:
-    def read(filename) -> Sequence[Any]:
+    @staticmethod
+    def read(filename: str) -> Sequence[Any]:
         local_root = os.path.dirname(__file__)
         with open(os.path.join(local_root, filename)) as stream:
             contents = simplejson.loads(stream.read())