diff --git a/riocli/apply/parse.py b/riocli/apply/parse.py
index 1e86574f..22f73ce4 100644
--- a/riocli/apply/parse.py
+++ b/riocli/apply/parse.py
@@ -39,7 +39,7 @@ class Applier(object):
     DEFAULT_MAX_WORKERS = 6
     DELETE_POLICY_LABEL = "rapyuta.io/deletionPolicy"
 
-    def __init__(self, files: typing.List, values: typing.List, secrets: typing.List):
+    def __init__(self, files: typing.List, values: typing.List, secrets: typing.List = []):
         self.files = {}
         self.objects = {}
         self.resolved_objects = {}