diff --git a/pyproject.toml b/pyproject.toml
index bab698a..fb3a1b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,6 +9,7 @@ description = "CLI key-authorization manager for envelope_crypto"
 requires-python = ">=3.10"
 dependencies = [
     "envelope_crypto @ git+ssh://git@git.rethinkstudios.io/rethink-public/envelope_crypto.git",
+    "cryptography>=42.0",
     "tomli>=2.0; python_version<'3.11'",
 ]
 
diff --git a/src/envelope_authorizer/commands/list_keys.py b/src/envelope_authorizer/commands/list_keys.py
index e8a0e08..fd54011 100644
--- a/src/envelope_authorizer/commands/list_keys.py
+++ b/src/envelope_authorizer/commands/list_keys.py
@@ -40,7 +40,7 @@ def run(config, storage, args) -> None:
     for doc in docs:
         meta = doc_meta(doc)
         print(
-            f"{doc.get('_id', '')[:16]:<18} "
+            f"{(doc.get('_id') or '')[:16]:<18} "
             f"{str(meta.get('friendly', '-')):<16} "
             f"{str(meta.get('created_by', '-')):<18} "
             f"{_created(meta):<21} "